Catalogo Rolamento Conico Timken
Short Description
Download Catalogo Rolamento Conico Timken...
Description
Timken tapered Roller bearing catalog cylindrical roller bearing catalog Timken tapered roller bearing catalog Bearings • Steel • Power Transmission Systems • Precision Components • Gears • Chain • Augers • Seals • Lubrication • Industrial Services Remanufacture and Repair
•
www.timken.com Price: USD $75
20M 12-11, rev. 11-12: Order No. 10481 Timken®
is a registered trademark of The Timken Company. • © 2012 The Timken Company • Printed in U.S.A.
Tapered Roller Bearing Catalog index Timken Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Shelf Life Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 ENGINEERING Tapered Roller Bearing Types and Cages. . . . . . . . . . . . . . . . . . . . . 12 Determination of Applied Loads and Bearing Analysis Symbols . 15 Metric System Tolerances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Inch System Tolerances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Tapered Roller Bearing Mounting Designs, Fitting Practices and Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Fitting Practice Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Operating Temperatures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Heat Generation and Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . 56 Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 TAPERED ROLLER BEARINGS Part-Numbering Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Radial Roller Bearings Single-Row TS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 IsoClass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399 TSF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423 TSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495 Double-Row TDO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 499 TDI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599 TDIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 630 TNA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 637 TNASW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 649 TNASWE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 654 2TS-IM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 659 2TS-DM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 688 2S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 712 SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 716 Tapered Roller Thrust Bearings. . . . . . . . . . . . . . . . . . . . . . . . . . . . 723 Part-Numbering Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 726 TTHD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 727 TTHDFL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 728 TTVS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 730 TTSP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 731 TTC, TTCS, TTCL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 734 Auxiliary Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 737 INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 747
TIMKEN TAPERED ROLLER BEARING CATALOG
1
TIMKEN Overview
CHOOSE TIMKEN STRENGTH You can count on the strength of Timken expertise and quality products to help you increase your productivity and gain a competitive edge in your industry. When you choose Timken, you receive more than high-quality products and services; you acquire a worldwide team of highly trained and experienced associates, eager to help you keep production rates high and downtime low. Whether it is a wheel assembly for a family vehicle, bearings outfitted for a deep-sea oil drilling rig, repair services for rail bearings or steel for an aircraft engine shaft, we supply the products and services you need that help keep the world turning.
FRICTION MANAGEMENT SOLUTIONS – A TOTAL SYSTEMS APPROACH Your industry is ever-changing, from the evolution of advanced motion-control systems to the demands from your customers. Turn to us to stay ahead of the curve. We use our friction-management know-how to offer solutions that maximize performance, fuel-efficiency and equipment life. We also offer integrated services that extend well beyond bearings, including condition monitoring systems and services, encoders and sensors, seals, premium lubricants and lubricators. Timken’s wide range of friction management solutions can include evaluations of your entire system – not just individual components. This provides cost-effective solutions to help you reach specific application goals. Working together, we help you meet these demands and ensure all your systems run smoothly.
2
TIMKEN TAPERED ROLLER BEARING CATALOG
TIMKEN Overview
Technology that moves you Innovation is one of our core values, and we’re known for our ability to solve engineering challenges. We focus on improving performance in the most difficult applications, and we’re passionate about creating technical solutions and services that help your equipment perform faster, harder, smoother and more efficiently. To do this, we invest in:
•• People, attracting and hiring scholars, engineers and
specialists from across the globe who are experts in mechanical power transmission, antifriction bearing design, tribology, metallurgy, clean steel production, precision manufacturing, metrology, and engineered surfaces and coatings.
•• Tools, including state-of-the-art laboratories, computers and manufacturing equipment.
•• The Future, identifying new concepts that make you
standout in your industry for years to come. Our ongoing investment in research and development activities allows us to grow our capabilities, expand our product and service portfolio, and deliver value over the long term.
We’re committed to finding new avenues for system sustainability. In the area of power density, we’re creating systems where we replace larger, more cumbersome components with smaller, more efficient bearings to help improve systems' performance. Wherever you're located, you can count on us at technology centers in North America and Asia - as well as in our manufacturing facilities and field offices on six continents - to develop ideas and resources to transform your concepts into reality.
TIMKEN TAPERED ROLLER BEARING CATALOG
3
TIMKEN Overview
A BRAND YOU CAN TRUST The Timken brand stands for quality, innovation and dependability. We take pride in the quality of our work, and you gain the peace-of-mind of knowing that each box contains an industry-trusted product. As our founder, Henry Timken, said, “Don’t set your name to anything you will ever have cause to be ashamed of.” We continue this mindset through the Timken Quality Management System (TQMS). With TQMS, we promote continuous quality improvements in our products and services to our global operations and supply chain networks. It helps us ensure that we’re consistently applying demanding quality management practices throughout the company. We also register each of our production facilities and distribution centers to the appropriate quality system standards for the industries they serve.
About The Timken Company The Timken Company keeps the world turning with innovative friction management and power transmission products and services that are critical to help hard-working machinery to perform efficiently and reliably. In 2011, Timken achieved sales of $5.2 billion from operations in 30 countries with approximately 20,000 people.
4
TIMKEN TAPERED ROLLER BEARING CATALOG
TIMKEN Overview
ABOUT THIS Catalog Timken offers an extensive range of bearings and accessories in both imperial and metric sizes. For your convenience, size ranges are indicated in millimeters and inches. Contact your Timken sales representative to learn more about our complete line for the special needs of your application.
USING THIS Catalog We are committed to providing our customers with maximum service and quality. This publication contains dimensions, tolerances and load ratings, as well as an engineering section describing fitting practices for shafts and housings, internal clearances, materials and other bearing features. It can provide valuable assistance in the initial consideration of the type and characteristics of the bearing that may best suit your particular needs. Every reasonable effort has been made to ensure the accuracy of the information contained in this writing, but no liability is accepted for errors, omissions or for any other reason. Timken products are sold subject to Timken’s terms and conditions of sale, including its limited warranty and remedy. Please contact your Timken sales engineer with questions.
Catalog FEATURES Dimensional and load rating data, within the various types and styles of bearings, is organized by size. ISO and ANSI/ABMA, as used in this publication, refer to the International Organization for Standardization and the American National Standards Institute/American Bearing Manufacturers Association.
Note Product performance is affected by many factors beyond the control of Timken. Therefore, the suitability and feasibility of all designs and product selection should be validated by you. This catalog is provided solely to give you, a customer of Timken or its parent or affiliates, analysis tools and data to assist you in your design. No warranty, expressed or implied, including any warranty of fitness for a particular purpose, is made by Timken. Timken products and services are sold subject to a Limited Warranty. You can see your Timken engineer for more information.
TIMKEN TAPERED ROLLER BEARING CATALOG
5
TIMKEN Overview
Shelf Life and storage of grease-lubricated bearings and components
STORAGE
Timken guidelines for the shelf life of grease-lubricated rolling bearings, components and assemblies are set forth below. Shelf life information is based on test data and experience. Shelf life should be distinguished from lubricated bearing/ component design life as follows:
•• Unless directed otherwise by Timken, Products should be
Shelf Life Policy Shelf life of the grease-lubricated bearing/component represents the period of time prior to use or installation. The shelf life is a portion of the anticipated aggregate design life. It is impossible to accurately predict design life due to variations in lubricant bleed rates, oil migration, operating conditions, installation conditions, temperature, humidity and extended storage. Shelf life values, available from Timken, represent a maximum limit – and assume adherence to the Timken suggested storage and handling guidelines. Deviations from Timken’s storage and handling guidelines may reduce shelf life. Any specification or operating practice that defines a shorter shelf life should be used. Timken cannot anticipate the performance of the grease lubricant after the bearing or component is installed or placed in service.
TIMKEN IS NOT RESPONSIBLE FOR THE SHELF LIFE OF ANY BEARING/COMPONENT LUBRICATED BY ANOTHER PARTY.
European REACH compliance Timken-branded lubricants, greases and similar products sold in stand-alone containers or delivery systems are subject to the European REACH (Registration, Evaluation, Authorization and Restriction of CHemicals) directive. For import into the European Union, Timken can sell and provide only those lubricants and greases that are registered with ECHA (European CHemical Agency). For further information, please contact your Timken engineer.
6
TIMKEN TAPERED ROLLER BEARING CATALOG
Timken suggests the following storage guidelines for its finished products (bearings, components and assemblies, hereinafter referred to as “Products”): kept in their original packaging until they are ready to be placed into service.
•• Do not remove or alter any labels or stencil markings on the packaging.
•• Products should be stored in such a way that the packaging is not pierced, crushed or otherwise damaged.
•• After a Product is removed from its packaging, it should be placed into service as soon as possible.
•• When removing a Product that is not individually
packaged from a bulk pack container, the container should be resealed immediately after the Product is removed.
•• Do not use Product that has exceeded its shelf life as defined in Timken’s shelf life guidelines statement.
•• The storage area temperature should be maintained between 0º C (32º F) and 40º C (104º F); temperature fluctuations should be minimized.
•• The relative humidity should be maintained below 60 percent and the surfaces should be dry.
•• The storage area should be kept free from airborne
contaminants such as, but not limited to, dust, dirt, harmful vapors, etc.
•• The storage area should be isolated from undue vibration. •• Extreme conditions of any kind should be avoided. Inasmuch as Timken is not familiar with a customer’s particular storage conditions, these guidelines are strongly suggested. However, the customer may very well be required by circumstance or applicable government requirements to adhere to stricter storage requirements.
TIMKEN Overview
A
Most bearing types are typically shipped protected with a corrosionpreventive compound that is not a lubricant. Such bearings may be used in oil-lubricated applications without removal of the corrosionpreventive compound. When using some specialized grease lubrications, it is advisable to remove the corrosion-preventive compound before packing the bearings with suitable grease. Some bearing types in this catalog are pre-packed with general purpose grease suitable for their normal application. Frequent replenishment of the grease may be necessary for optimum performance. Care must be exercised in lubricant selection, however, since different lubricants are often incompatible. When specified by the customer, other bearings may be ordered pre-lubricated. Upon receipt of a bearing shipment, ensure that the bearings are not removed from their packaging until they are ready for mounting so that they do not become corroded or contaminated. Bearings should be stored in an appropriate atmosphere in order that they remain protected for the intended period.
Warning
Failure to observe the following warnings could create a risk of death or serious injury. Proper maintenance and handling practices are critical. Always follow installation instructions and maintain proper lubrication. Never spin a bearing with compressed air. The rollers may be forcefully expelled.
Warnings for this product line are found in this catalog and posted on www.timken.com/warnings
Any questions concerning shelf life or storage should be directed to your local sales office.
TIMKEN TAPERED ROLLER BEARING CATALOG
7
TAPERED ROLLER BEARING INTRODUCTION
Timken ® Tapered Roller Bearings – Reliability, Versatility, Choice Demanding applications call for reliable solutions. Improve your equipment’s performance and reduce your downtime and maintenance costs by turning to Timken® tapered roller bearings. When you purchase a Timken® bearing, you’re investing in a product that’s designed with you in mind. Reliability. Expert craftsmanship, well-equipped production facilities and an ongoing investment in technology ensure our products are synonymous with quality and reliability. Our tapered roller bearings stand up to extreme situations, including high-corrosive, high-temperature, vacuum or lowlubrication environments. Versatility. Use Timken tapered roller bearings to help your equipment excel when it faces combined radial and thrust loads. Our bearings are uniquely designed to manage both types of loads on rotating shafts and in housings. Choice. From single- to double- to four-row configurations to thrust, choose from nearly 26,000 product combinations to find the right bearing for your application.
Design Features Each tapered roller bearing contains four interdependent components: the cone (inner ring), the cup (outer ring), tapered rollers (rolling elements) and the cage (roller retainer). Tapered angles allow our bearings to efficiently control a combination of radial and thrust loads. The steeper the outer ring angle, the greater ability the bearing has to handle thrust loads. To provide a true rolling motion of the rollers on the raceways, the extensions of the raceways and the tapered surfaces of the rollers come together at a common point, the apex, on the axis of rotation.
Product Offering We have the most extensive line of tapered roller bearings available anywhere in the world. Single-, double-, four-row and thrust options are available in sizes ranging from 8 mm (0.31496 in.) bore to > 3000 mm (118 in.) outside diameter (O.D.). Timken has the bearings to fit most applications, including yours. Refer to www.timken.com for four-row information. Contents of this catalog include:
Single-Row Bearing Types
•• TS (pressed steel and pin-type) •• TSF (flanged cup) •• TSL (DUO-FACE® Plus Seal) •• IsoClass™ Series Double-Row Bearing Types
•• TDO (single piece [double] outer ring and two single inner rings)
•• TDI (double-row double inner race) •• TDIT (double-row double inner race with tapered bore) •• TDO (double-row double outer-race) •• TNA (double-row non-adjustable) •• TNASW (double-row, non-adjustable with lubricant slots) •• TNASWE (double-row, non-adjustable with lubricant slots and extended back face rib)
•• 2TS-IM (two single-row assemblies, indirect mount) •• 2TS-DM(two single-row assemblies, direct mount) •• 2S (two single-row assemblies with snap ring spacer) •• SR (two single row, Set-Right™ assembly)
Customization Options
Thrust Bearing Types
For extreme environments, take advantage of our customization options. We can tailor geometries and apply engineered surfaces to help improve performance.
•• TTHD (heavy duty) •• TTHDFL (flat race) •• TTVS (flat race, self-aligning) •• TTC (light-duty, cageless) •• TTSP (light-duty, with cage)
8
TIMKEN TAPERED ROLLER BEARING CATALOG
TAPERED ROLLER BEARING INTRODUCTION
Industry Presence
Dependable Service
Timken tapered roller bearings effectively reduce friction and help transmit power in industries like:
Every Timken tapered roller bearing is backed by the service of our industry-leading experts who are ready to assist you with product design, application knowledge and 24/7 field engineering support – anything you need to help improve uptime and maximize equipment performance.
•• Aerospace •• Agriculture •• Automotive •• Heavy truck •• Cement •• Aggregate •• Rail •• Oil and gas
•• Construction •• Gear drives •• Machine tools •• Mining •• Paper •• Metals •• Wind and Coal
Timken offers a wide range of bearing products for many different industries. A complete listing of our product catalogs can be found at www.timken.com.
Power Generation
Quality Solutions At Timken, our brand stands for outstanding quality in everything we do, from product design and manufacturing to engineering support and distribution. We're the only bearing manufacturer in the world that makes its own steel. By using clean, high-alloy steel in our tapered roller bearings, we can help ensure the overall quality of our product. We know how critical quality materials are to product performance. We also implement the Timken Quality Management System in every plant worldwide, so each bearing product meets the same high performance standards – no matter where in the world it is manufactured.
TIMKEN TAPERED ROLLER BEARING CATALOG
9
ENGINEERING
10
TIMKEN TAPERED ROLLER BEARING CATALOG
ENGINEERING
Engineering The following topics are covered within this engineering section:
•• Tapered roller bearing design types.
•• Cage design types. •• Fitting practice and mounting recommendations.
•• Lubrication recommendations. This engineering section is not intended to be comprehensive, but does serve as a useful guide in tapered roller bearing selection. To view the complete engineering catalog, please visit www.timken.com. To order the catalog, please contact your Timken engineer and request a copy of the Timken Engineering Manual, order number 10424.
TIMKEN TAPERED ROLLER BEARING CATALOG
11
ENGINEERING Bearing types AND CAGES
Tapered ROLLER BEARINGS types and cages Single-Row Bearings
double-Row Bearings
TS - Single-row
TDO - Double outer ring
This is the basic and the most widely used type of tapered roller bearing. It consists of the inner-ring assembly and the outer ring. It is usually fitted as one of an opposing pair. During equipment assembly, single-row bearings can be “set” to the required clearance (endplay) or preload condition to optimize performance.
This has a one-piece (double) outer ring and two single inner rings. It is usually supplied complete with an inner-ring spacer as a pre-set assembly. This configuration gives a wide effective bearing spread and is frequently chosen for applications where overturning moments are a significant load component. TDO bearings can be used in fixed (locating) positions or allowed to float in the housing bore, for example, to compensate for shaft expansion. TDOCD outer rings also are available in most sizes. These outer rings have holes in the O.D. that permit the use of pins to prevent outer ring rotation in the housing.
Fig. 1. Single-row TS bearing.
TSF - Single-row, with flanged outer ring The TSF type is a variation on the basic single-row bearing. TSF bearings have a flanged outer ring to facilitate axial location and accurately aligned seats in a through-bored housing.
Fig. 3. Double-row TDO bearing.
TDI - Double inner ring TDIT - Double inner ring with tapered bore Both comprise a one-piece (double) inner ring and two single outer rings. They are usually supplied complete with an outerring spacer as a pre-set assembly. TDI and TDIT bearings can be used at fixed (locating) positions on rotating shaft applications. For rotating housing applications, the double inner ring of type TDI can be used to float on the stationary shaft. Type TDIT has a tapered bore to facilitate removal when an interference fit is essential, yet regular removal is required.
Fig. 2. Single-row TSF bearing with flanged outer ring.
TDI
TDIT
Fig. 4. Double-row, double-inner-ring bearings.
12
TIMKEN TAPERED ROLLER BEARING CATALOG
ENGINEERING bearing types AND CAGES
TNA
- Non-adjustable
TNASW - Non-adjustable with lubricant slots TNASWE - Non-adjustable with lubricant slots and extended back face rib These three bearing types are similar to the TDO with a one-piece (double) outer ring and two single inner rings. The inner-ring front faces are extended so they abut, eliminating the need for a separate inner-ring spacer. Supplied with a built-in clearance to give a standard setting range, these bearings provide a solution for many fixed or floating bearing applications where optimum simplicity of assembly is required. Types TNASW and TNASWE are variations having chamfers and slots on the front face of the inner ring to provide lubrication through the shaft. Type TNASWE have extended back face ribs on the inner rings which are ground on the O.D. to allow for the use of a seal or stamped closure. These designs are typically used on stationary shaft applications.
SR
2S Fig. 6. Spacer assemblies.
2S - Two single-row assembly Often referred to as snap-ring assemblies, type 2S consist of two basic single-row bearings (type TS). They are supplied complete with inner-ring and outer-ring spacers to give a predetermined bearing setting when assembled. Type 2S have a specified setting range to suit the duty of the application. They have an inner-ring spacer and a snap-ring, which also serves as the outer-ring spacer, to give axial location in a through-bored housing.
SR - Set-RightTM assembly Type SR are made to a standard setting range, based on Timken’s Set-Right™ automated setting technique suitable for most industrial applications. They have two spacers and an optional snap-ring that may be used for axial location. Because both types are made up of popular sizes of single-row bearings, they provide a low-cost option for many applications. There are two basic mounting arrangements for spacer assemblies.
TNA
TNASW
TNASWE
Fig. 5. Double-row, non-adjustable bearings.
Spacer assemblies Any two single-row bearings (type TS) can be supplied as a double-row, pre-set, ready-to-fit assembly by the addition of spacers, machined to pre-determined dimensions and tolerances. Spacer assemblies are provided in two types: "2S" and "SR". This concept can be applied to produce custom-made double-row bearings to suit specific applications. In addition to providing a bearing that automatically gives a pre-determined setting at assembly without the need for a manual setting, it is possible to modify the assembly width to suit an application, simply by varying the spacer widths.
••
Type 2TS-IM (indirect mounting) These consist of two single-row bearings with an inner-ring and outer-ring spacer. In some applications, the outer-ring spacer is replaced by a shoulder in the bearing housing.
••
Type 2TS-DM (direct mounting) These consist of two single-row bearings, with inner rings abutting and an outer-ring spacer. They are generally used at fixed (locating) positions on rotating shaft applications.
2TS-IM
2TS-DM
Fig. 7. Basic spacer assemblies.
TIMKEN TAPERED ROLLER BEARING CATALOG
13
ENGINEERING CAGES
Tapered Roller Bearing Cages Stamped-Steel Cages
Machined Cages
The most common type of cage used for tapered roller bearings is the stamped-steel cage. These cages are mass produced from low-carbon sheet steel using a series of cutting, forming and punching operations. These cages can be used in high temperature and harsh lubricant environments.
Machined cages for tapered roller bearings are robust in design and are suited for high-speed and high-load applications. Machined cages use alloy steels and are produced through milling and broaching operations. Assembly does not require a close-in operation and rollers can be retained using nibs or staking. Oil holes also can be easily added for extra lubrication for demanding applications. Some designs are silver plated for special applications.
Pin-Type Cages Fig. 8. Stamped-steel cage.
Polymer Cages Cages for tapered roller bearings made of polymer material are used primarily for pre-greased and sealed package designs. The most common polymer materials used are Nylon thermoplastics with glass reinforcement. Polymer cages can be mass produced in large quantities and offer more design flexibility than stampedsteel types. Polymer cages are lightweight and easy to assemble. In some instances, increased bearing rating can be achieved by allowing one or two extra rollers in the bearing complement. Care should be exercised when using aggressive lubricants with EP (extreme-pressure) additives in combination with elevated temperatures greater than 107° C (225° F).
14
TIMKEN TAPERED ROLLER BEARING CATALOG
Tapered roller bearing pin-type cages retain the rolling elements by the use of a pin located through an axial hole in the center of the roller. Pin-type cages for tapered roller bearings consist of two rings with roller pins attached by screw threads at one end and welding at the other end. These types of cages are primarily used for larger tapered roller bearing designs (greater than 400 mm [15.7480 in.] O.D.). Pin-type cages are machined out of steel and typically allow for an increased number of rolling elements. Pin-type cages are restricted to low-speed applications (less than 20 m/sec [4000 ft/min] rib speed).
ENGINEERING DETERMINATION OF APPLIED LOADS AND BEARING ANALYSIS
Determination of applied loads and Bearing Analysis SUMMARY OF SYMBOLS USED TO DETERMINE APPLIED LOADS AND BEARING ANALYSIS Symbol
Description
a
Axial Distance from Inner Ring Backface to Effective Load Center
Units (Metric/Inch System) mm, in.
a1 Reliability Life Factor
unitless
a2 Material Life Factor
unitless
a3
unitless
Operating Condition Life Factor
a3d Debris Life Factor
unitless
a3k Load Zone Life Factor
unitless
a3l Lubrication Life Factor
unitless
a3p Low-Load Life Factor
Symbol
Description
Units (Metric/Inch System)
DmG Mean or Effective Working Diameter of the Gear
mm, in.
DmP Effective Working Diameter of the Pinion
mm, in.
DmW Effective Working Diameter of the Worm
mm, in.
DpG
Pitch Diameter of the Gear
mm, in.
DpP
Pitch Diameter of the Pinion
mm, in.
DpW
Pitch Diameter of the Worm
mm, in.
e Life Exponent
unitless
unitless
e Limiting Value of Fa/Fr for the Applicability of Different Values of Factors X and Y
unitless
ae Effective Bearing Spread
mm, in.
E Free Endplay
mm, in.
A, B, …
Bearing Position (used as subscripts)
unitless
f Lubricant Flow Rate L/min, U.S. pt/min
B
Outer Ring Width
mm, in.
f0 Viscous Dependent Torque Coefficient
unitless
B1 Inner Ring Width
mm, in.
f1 Load Dependent Torque Coefficient
unitless
b
mm, in.
fb
Belt or Chain Pull
mm, in.
fn
Speed Factor
Tooth Length
c1, c2 Linear Distance (positive or negative). C Ca90
Basic Dynamic Radial Load Rating of a Double-Row N, lbf Bearing for an L10 of One Million Revolutions Basic Dynamic Thrust Load Rating of a Single-Row Bearing for an L10 of 90 Million Revolutions or 3000 Hours at 500 RPM N, lbf
N, lbf unitless
f2 Combined Load Factor
unitless
f3 Combined Load Factor
unitless
F
General Term for Force
N, lbf
F1, F2, …, Fn Magnitudes of Applied Force During a Loading Cycle
N, lbf N, lbf
Co
Basic Static Radial Load Rating N, lbf
Fa
Coa
Basic Static Axial Load Rating N, lbf
Fai Induced Thrust (Axial) Load Due to Radial Loading
C90
Basic Dynamic Radial Load Rating of a Single-Row Bearing for an L10 of 90 Million Revolutions N, lbf
Fac Induced Thrust (Axial) Load Due to Centrifugal Loading N, lbf
C90(2)
Basic Dynamic Radial Load Rating of a Double-Row Bearing for an L10 of 90 Million Revolutions N, lbf
Ca
Basic Dynamic Axial Load Rating N, lbf
Cg
Geometry Factor (used in a3l equation)
unitless
Cl Load Factor (used in a3l equation)
unitless
Cj Load Zone Factor (used in a3l equation)
unitless
Cs
unitless
Speed Factor (used in a3l equation)
Cv Viscosity Factor (used in a3l equation)
unitless
Cgr
Grease Lubrication Factor (used in a3l equation)
unitless
Cp
Specific Heat of Lubricant
Ct
Basic Thrust Dynamic Load Rating N, lbf
d
Bearing Bore Diameter
mm, in.
d
Ball Diameter
mm, in.
d1
Spherical Diameter
mm, in.
da
Shaft Shoulder Diameter
mm, in.
J/(Kg - °C), BTU/(lbf - °F)
d0 Mean Inner Ring Diameter
mm, in.
dc Distance Between Gear Centers
mm, in.
dm Mean Bearing Diameter
mm, in.
dsi
Shaft Inside Diameter
mm, in.
D
Bearing Outside Diameter
mm, in.
D0
Tapered Roller Bearing Outer Ring Mean Raceway Diameter
mm, in.
Applied Thrust (Axial) Load
N, lbf
FaG
Thrust Force on Gear
N, lbf
FaP
Thrust Force on Pinion
N, lbf N, lbf
FaW
Thrust Force on Worm
Faz
Allowable Axial Load N, lbf
Fb
Belt or Chain Pull
N, lbf
Fβ Load Term for Torque Equation
N, lbf
Fc Centrifugal Force
N, lbf
Fr
Applied Radial Load
N, lbf
Frh
Resultant Horizontal Force
N, lbf
Frs
Resultant Separating Force
N, lbf
Frv Resultant Vertical Force
N, lbf
Fs
Separating Force on Gear
N, lbf
FsG
Separating Force on Gear
N, lbf
FsP
Separating Force on Pinion
N, lbf
FsW
Separating Force on Worm
N, lbf
Ft
Tangential Force
N, lbf
Fte
Tractive Effort on Vehicle Wheels
N, lbf
FtG
Tangential Force on Gear
N, lbf
FtP
Tangential Force on Pinion
N, lbf
FtW
Tangential Force on Worm
N, lbf
FW Force of Unbalance
N, lbf
Fwb Weighted Average Load N, lbf
Dh Housing Outside Diameter
mm, in.
G
Gear (used as subscript)
unitless
Dm Mean Diameter or Effective Working Diameter of a Sprocket, Pulley, Wheel or Tire
G1
Geometry Factor from Bearing Data Tables
unitless
mm, in.
G2
Geometry Factor from Bearing Data Tables
unitless
Dm
mm, in.
H
Power
Tapered Roller Mean Large Rib Diameter
kW, hp
Hs Housing Shoulder Inner Diameter
mm, in.
TIMKEN TAPERED ROLLER BEARING CATALOG
15
ENGINEERING DETERMINATION OF APPLIED LOADS AND BEARING ANALYSIS
Symbol
Description
HFs
Static Load Rating Adjustment Factor for Raceway Hardness
Units (Metric/Inch System) unitless
i Number of Rows of Rollers in a Bearing
unitless
iB Number of Bearing Rows Taking Load
unitless lbf/RPM2
k Centrifugal Force Constant k1
Bearing Torque Constant
unitless
k4, k5, k6 Dimensional Factor to Calculate Heat Generation K
unitless
Tapered Roller Bearing K-factor; ratio of basic dynamic radial load rating to basic dynamic thrust rating in a single-row bearing
K
Ball Bearing Constant Based on Geometry
K1, K2
Super Precision K-Factors
unitless
Ki Inner Ring Contour Radius Expressed as a Decimal Fraction of the Ball Diameter
decimal fraction
Kia
Radial Runout of Inner Ring Assembly
mm, in.
Kn
K-factor for Bearing #n
unitless
KT Relative Thrust Load Factor – Ball Bearings
unitless
LH Lead – Axial Advance of a Helix for One Complete Revolution
mm, in.
L Distance Between Bearing Geometric Center Lines
mm, in.
millions of revolutions
Lf Life Factor
unitless
m
Gearing Ratio
unitless
M
Bearing Operating Torque N-m, N-mm, lb.-in.
Mo Moment N-m, N-mm, lb.-in. rot/min, RPM
n1, n2,…, nn Rotation Speeds During a Loading Cycle
rot/min, RPM
na
rot/min, RPM
nG
Gear Operating Speed
rot/min, RPM
nP
Pinion Operating Speed
rot/min, RPM
nW Worm Operating Speed
rot/min, RPM
Nc Number of Rotations of the Ball and Cage Assembly
unitless
Ni Number of Rotations of the Inner Ring
unitless
NG Number of Teeth in the Gear
unitless
NP Number of Teeth in the Pinion
unitless
NS Number of Teeth in the Sprocket
unitless
Nf
Speed Factor
unitless
P
Pinion (used as subscript)
unitless
Po
Static Equivalent Load
N, lbf
Poa
Static Equivalent Thrust (Axial)
N, lbf
Por
Static Equivalent Radial Load
N, lbf
Pa Dynamic Equivalent Axial Load
N, lbf
Pr Dynamic Equivalent Radial Load
N, lbf
Peq Equivalent Dynamic Load
N, lbf
Q
Generated Heat or Heat Dissipation Rate W, BTU/min
Qgen
Generated Heat W, BTU/min
Qoil Heat Dissipated by a Circulating Oil System W, BTU/min r Radius to Center of Mass R
16
Percent Reliability, Used in the Calculation of the a1 Factor
TIMKEN TAPERED ROLLER BEARING CATALOG
mm, in.
s
Shaft (used as subscript)
unitless
Sd
Inner Ring Reference Face Runout
mm, in.
SD
Outside Cylindrical Surface Runout
mm, in.
Sea
Axial Runout of Outer Ring Assembly
mm, in.
Sia
Axial Runout of Inner Ring Assembly
Units (Metric/Inch System) mm, in.
mm, in.
mm, in. unitless
unitless
T
Applied Thrust (Axial) Load
N, lbf
Te
Equivalent Thrust Load
N, lbf
mm, in. decimal fraction
Reference Speed
Shaft Diameter
V Linear Velocity or Speed
Outer Ring Contour Radius Expressed as a Decimal Fraction of the Ball Diameter
Bearing Operating Speed or General Term for Speed
S
v Vertical (used as subscript)
Radial Runout of Outer Ring Assembly
n
Radial Internal Clearance
unitless
Ko
Bearing Life
Description
RIC
t1, t2, …, tn Fractions of Time During a Loading Cycle
Kea
L10
Symbol
unitless km/h, mph
VBS
Inner Ring Width Variation
mm, in.
VCS
Outer Ring Width Variation
mm, in.
Vr Rubbing, Surface or Tapered Roller Bearing Rib Velocity
m/s, fpm
W Worm (used as subscript)
unitless
X Dynamic Radial Load Factor
unitless
X0
Static Radial Load Factor
unitless
Y, Y1, Y2, ... Dynamic Thrust (Axial) Load Factor
unitless
Y0
Static Thrust (Axial) Load Factor
unitless
ΥG
Bevel Gearing – Gear Pitch Angle
Hypoid Gearing – Gear Root Angle
deg.
ΥP
Bevel Gearing – Pinion Pitch Angle
deg.
Z
Number of Rolling Elements
deg.
Hypoid Gearing – Pinion Face Angle aT Coefficient of Linear Expansion
deg. unitless mm/mm/°C, in./in./°F
ao
Tapered Roller Bearing Half Included Outer Ring Raceway Angle
deg.
a
Ball Bearing Nominal Contact Angle
deg.
ΔT
Temperature Difference Between Shaft/Inner Ring/ Rollers and Housing/Outer Ring
ΔBs
Inner Ring Width Deviation
mm, in.
°C, °F
ΔCs
Outer Ring Width Deviation
mm, in.
Δdmp
Deviation of Mean Bore Diameter in a Single Plane
mm, in.
ΔDmp
Deviation of Mean Outside Diameter in a Single Plane mm, in.
ds Interference Fit of Inner Ring on Shaft
mm, in.
dh Interference Fit of Outer Ring in Housing
mm, in.
η Efficiency, Decimal Fraction q1, q2, q3
Gear Mesh Angles Relative to the Reference Plane deg., rad
qi, qo
Oil Inlet or Outlet Temperature
l Worm Gear Lead Angle m Coefficient of Friction
°C, °F deg. unitless
m Lubricant Dynamic Viscosity
cP
v Lubricant Kinematic Viscosity
cSt
so
Approximate Maximum Contact Stress MPa, psi
φG Normal Tooth Pressure Angle for the Gear
φP Normal Tooth Pressure Angle for the Pinion
ψG Helix (Helical) or Spiral Angle for the Gear ψP Helix (Helical) or Spiral Angle for the Pinion
r Lubricant Density
deg. deg. deg. deg. kg/m3, lb./ft3
ENGINEERING METRIC SYSTEM TOLERANCES
METRIC system Tolerances Tapered bearings are manufactured to a number of specifications with each having classes that define tolerances on dimensions such as bore, O.D., width and runout. Metric bearings have been manufactured to corresponding standard negative tolerances. Boundary dimension tolerances for tapered roller bearing usage are listed in the following tables. These tolerances are provided for use in selecting bearings for general applications in conjunction with the bearing mounting and fitting practices offered in later sections. The following table summarizes the different specifications and classes for tapered roller bearings.
Table 1. Bearing Specifications and classes System
Specification
Metric
Timken
Tapered Roller Bearings
K
N
C
B
A
ISO/DIN
Inch
Bearing Type
Standard Bearing Class
Precision Bearing Class AA
All Bearing Types
P0
P6
P5
P4
P2
-
ABMA
Tapered Roller Bearings
K
N
C
B
A
-
Timken
Tapered Roller Bearings
4
2
3
0
00
000
ABMA
Tapered Roller Bearings
4
2
3
0
00
-
TIMKEN TAPERED ROLLER BEARING CATALOG
17
ENGINEERING METRIC SYSTEM TOLERANCES
Metric system bearings (ISO and J Prefix Parts) tolerances lie within those currently specified in ISO 492 with the exception of a small number of dimensions indicated in the tables. The differences normally have an insignificant effect on the mounting and performance of tapered roller bearings.
Timken manufactures metric system bearings to six tolerance classes. Classes K and N are often referred to as standard classes. Class N has more closely controlled width tolerances than K. Classes C, B, A and AA are precision classes. These
Table 2. tapered roller bearing tolerances – Inner ring Bore (Metric) Bearing Types
TS TSF SR(1)
Standard Bearing Class
Bore
K
C
B
A
AA
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
10.000 0.3937
18.000 0.7087
0.000 -0.012 0.000 -0.012 0.000 -0.007 0.000 -0.005 0.000 -0.005 0.000 -0.005 0.0000 -0.00047 0.0000 -0.00047 0.0000 -0.0002 0.0000 -0.0001 0.0000 -0.0001 0.0000 -0.0001
18.000 0.7087
30.000 1.1811
0.000 -0.012 0.000 -0.012 0.000 -0.008 0.000 -0.006 0.000 -0.006 0.000 -0.006 0.0000 -0.0005 0.0000 -0.0005 0.0000 -0.0003 0.0000 -0.0002 0.0000 -0.0002 0.0000 -0.0002
30.000 1.1811
50.000 1.9685
0.000 -0.012 0.000 -0.012 0.000 -0.010 0.000 -0.008 0.000 -0.008 0.000 -0.008 0.0000 -0.0005 0.0000 -0.0005 0.0000 -0.0004 0.0000 -0.0003 0.0000 -0.0003 0.0000 -0.0003
50.000 1.9685
80.000 3.1496
0.000 -0.015 0.000 -0.015 0.000 -0.012 0.000 -0.009 0.000 -0.008 0.000 -0.008 0.0000 -0.0006 0.0000 -0.0006 0.0000 -0.0005 0.0000 -0.0004 0.0000 -0.0003 0.0000 -0.0003
80.000 3.1496
120.000 4.7244
0.000 -0.020 0.000 -0.020 0.000 -0.015 0.000 -0.010 0.000 -0.008 0.000 -0.008 0.0000 -0.00079 0.0000 -0.00079 0.0000 -0.0006 0.0000 -0.0004 0.0000 -0.0003 0.0000 -0.0003
120.000 4.7244
180.000 7.0886
0.000 -0.025 0.000 -0.025 0.000 -0.018 0.000 -0.013 0.000 -0.008 0.000 -0.008 0.0000 -0.00098 0.0000 -0.00098 0.0000 -0.0007 0.0000 -0.0005 0.0000 -0.0003 0.0000 -0.0003
180.000 7.0866
250.000 9.8425
0.000 -0.030 0.000 -0.030 0.000 -0.022 0.000 -0.015 0.000 -0.008 0.000 -0.008 0.0000 -0.0012 0.0000 -0.0012 0.0000 -0.0009 0.0000 -0.0006 0.0000 -0.0003 0.0000 -0.0003
250.000 9.8425
265.000 10.4331
0.000 -0.035 0.000 -0.035 0.000 -0.022 0.000 -0.015 0.000 -0.008 0.000 -0.008 0.0000 -0.0014 0.0000 -0.0014 0.0000 -0.0009 0.0000 -0.0006 0.0000 -0.0003 0.0000 -0.0003
265.000 10.4331
315.000 12.4016
0.000 -0.035 0.000 -0.035 0.000 -0.022 0.000 -0.015 0.000 -0.008 0.000 -0.008 0.0000 -0.0014 0.0000 -0.0014 0.0000 -0.0009 0.0000 -0.0006 0.0000 -0.0003 0.0000 -0.0003
315.000 12.4016
400.000 15.7480
0.000 -0.040 0.000 -0.040 0.000 -0.025 0.0000 -0.0016 0.0000 -0.0016 0.0000 -0.0010
– –
– –
– –
– –
– –
– –
400.000 15.7480
500.000 19.6850
0.000 -0.045 0.000 -0.045 0.000 -0.025 0.0000 -0.0018 0.0000 -0.0018 0.0000 -0.0010
– –
– –
– –
– –
– –
– –
500.000 19.6850
630.000 24.8031
0.000 -0.050 0.000 -0.050 0.000 -0.030 0.0000 -0.0020 0.0000 -0.0020 0.0000 -0.0012
– –
– –
– –
– –
– –
– –
630.000 24.8031
800.000 31.4961
0.000 -0.080 0.0000 -0.0031
– –
– –
0.000 -0.040 0.0000 -0.0014
– –
– –
– –
– –
– –
– –
800.000 31.4961
1000.000 0.000 -0.100 39.3701 0.0000 -0.0040
– –
– –
0.000 -0.050 0.0000 -0.0020
– –
– –
– –
– –
– –
– –
1000.000 1200.000 0.000 -0.130 39.3701 47.2441 0.0000 -0.0051
– –
– –
0.000 -0.060 0.0000 -0.0024
– –
– –
– –
– –
– –
– –
1200.000 1600.000 0.000 -0.150 47.2441 62.9921 0.0000 -0.0065
– –
– –
0.000 -0.080 0.0000 -0.0031
– –
– –
– –
– –
– –
– –
1600.000 2000.000 0.000 -0.200 62.9921 78.7402 0.0000 -0.0079
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
2000.000 78.7402
– –
0.000 -0.250 0.0000 -0.0098
(1)SR assemblies are manufactured to tolerance class N only.
18
Precision Bearing Class
N
TIMKEN TAPERED ROLLER BEARING CATALOG
ENGINEERING METRIC SYSTEM TOLERANCES
Table 3. tapered roller bearing tolerances – Outer ring outside diameter (Metric) Bearing Type
TS TSF SR(1)
Standard Bearing Class
O.D.
K
Precision Bearing Class
N
C
B
A
AA
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
10.000 0.3937
18.000 0.7087
0.000 0.0000
-
-
-
-
-
-
18.000 0.7087
30.000 1.1811
0.000 -0.012 0.000 -0.012 0.000 -0.008 0.000 -0.0006 0.000 -0.008 0.000 -0.008 0.0000 -0.00047 0.0000 -0.00047 0.0000 -0.0003 0.0000 -0.0002 0.0000 -0.0003 0.0000 -0.0003
30.000 1.1811
50.000 1.9685
0.000 -0.014 0.000 -0.014 0.000 -0.009 0.000 -0.007 0.000 -0.008 0.000 -0.008 0.0000 -0.0005 0.0000 -0.0005 0.0000 -0.0004 0.0000 -0.0003 0.0000 -0.0003 0.0000 -0.0003
50.000 1.9685
80.000 3.1496
0.000 -0.016 0.000 -0.016 0.000 -0.011 0.000 -0.009 0.000 -0.008 0.000 -0.008 0.0000 -0.0006 0.0000 -0.0006 0.0000 -0.0004 0.0000 -0.0004 0.0000 -0.0003 0.0000 -0.0003
80.000 3.1496
120.000 4.7244
0.000 -0.018 0.000 -0.018 0.000 -0.013 0.000 -0.010 0.000 -0.008 0.000 -0.008 0.0000 -0.0007 0.0000 -0.0007 0.0000 -0.0005 0.0000 -0.0004 0.0000 -0.0003 0.0000 -0.0003
120.000 4.7244
150.000 5.9055
0.000 -0.020 0.000 -0.020 0.000 -0.015 0.000 -0.011 0.000 -0.008 0.000 -0.008 0.0000 -0.00079 0.0000 -0.00079 0.0000 -0.0006 0.0000 -0.0004 0.0000 -0.0003 0.0000 -0.0003
150.000 5.9055
180.000 7.0866
0.000 -0.025 0.000 -0.025 0.000 -0.018 0.000 -0.013 0.000 -0.008 0.000 -0.008 0.0000 -0.00098 0.0000 -0.00098 0.0000 -0.0007 0.0000 -0.0005 0.0000 -0.0003 0.0000 -0.0003
180.000 7.0866
250.000 9.8425
0.000 -0.030 0.000 -0.030 0.000 -0.020 0.000 -0.015 0.000 -0.008 0.000 -0.008 0.0000 -0.0012 0.0000 -0.0012 0.0000 -0.0008 0.0000 -0.0006 0.0000 -0.0003 0.0000 -0.0003
250.000 9.8425
265.000 10.4331
0.000 -0.035 0.000 -0.035 0.000 -0.025 0.000 -0.018 0.000 -0.008 0.000 -0.008 0.0000 -0.0014 0.0000 -0.0014 0.0000 -0.0010 0.0000 -0.0007 0.0000 -0.0003 0.0000 -0.0003
265.000 10.4331
315.000 12.4016
0.000 -0.035 0.000 -0.035 0.000 -0.025 0.000 -0.018 0.000 -0.008 0.000 -0.008 0.0000 -0.0014 0.0000 -0.0014 0.0000 -0.0010 0.0000 -0.0007 0.0000 -0.0003 0.0000 -0.0003
315.000 12.4016
400.000 15.7480
0.000 -0.040 0.000 -0.040 0.000 -0.028 0.000 -0.020 0.0000 -0.0016 0.0000 -0.0016 0.0000 -0.0011 0.0000 -0.0008
400.000 15.7480
500.000 19.6850
0.000 -0.045 0.000 -0.045 0.000 -0.030 0.0000 -0.0018 0.0000 -0.0018 0.0000 -0.0012
– –
500.000 19.6850
630.000 24.8031
0.000 -0.050 0.000 -0.050 0.000 -0.035 0.0000 -0.0020 0.0000 -0.0020 0.0000 -0.0014
630.000 24.8031
800.000 31.4961
0.000 -0.075 0.0000 -0.0030
– –
– –
800.000 1000.000 0.000 -0.100 31.4961 39.3701 0.0000 -0.0040
– –
1000.000 1200.000 0.000 -0.130 39.3701 47.2441 0.0000 -0.0051
0.000 -0.008 0.000 -0.008 0.0000 -0.0003 0.0000 -0.0003
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
0.000 -0.040 0.0000 *0.0016
– –
– –
– –
– –
– –
– –
– –
0.000 -0.050 0.0000 -0.0020
– –
– –
– –
– –
– –
– –
– –
– –
0.000 -0.060 0.0000 -0.0024
– –
– –
– –
– –
– –
– –
1200.000 1600.000 0.000 -0.165 47.2441 62.9921 0.0000 -0.0065
– –
– –
0.000 -0.080 0.0000 -0.0031
– –
– –
– –
– –
– –
– –
1600.000 2000.000 0.000 -0.200 62.9921 78.7402 0.0000 -0.0079
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
2000.000 78.7402
– –
0.000 -0.250 0.0000 -0.0098
(1)SR assemblies are manufactured to tolerance class N only.
TIMKEN TAPERED ROLLER BEARING CATALOG
19
ENGINEERING METRIC SYSTEM TOLERANCES
Table 4. tapered roller bearing tolerances – Inner Ring width (Metric) Bearing Types
TS TSF
20
Standard Bearing Class
Bore
K
Precision Bearing Class
N
C
B
A
AA
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
10.000 0.3937
50.000 1.9685
0.000 -0.100 0.000 -0.050 0.000 -0.200 0.000 -0.200 0.000 -0.200 0.000 -0.200 0.0000 -0.0040 0.0000 -0.0020 0.0000 -0.0079 0.0000 -0.0079 0.0000 -0.0079 0.0000 -0.0079
50.000 1.9685
120.000 4.7244
0.000 -0.150 0.000 -0.050 0.000 -0.300 0.000 -0.300 0.000 -0.300 0.000 -0.300 0.0000 -0.0059 0.0000 -0.0020 0.0000 -0.0118 0.0000 -0.0118 0.0000 -0.0118 0.0000 -0.0118
120.000 4.7244
180.000 7.0866
0.000 -0.200 0.000 -0.050 0.000 -0.300 0.000 -0.300 0.000 -0.300 0.000 -0.300 0.0000 -0.0079 0.0000 -0.0020 0.0000 -0.0118 0.0000 -0.0118 0.0000 -0.0118 0.0000 -0.0118
180.000 7.0866
250.000 9.8425
0.000 -0.200 0.000 -0.050 0.000 -0.350 0.000 -0.350 0.000 -0.350 0.000 -0.350 0.0000 -0.0079 0.0000 -0.0020 0.0000 -0.0138 0.0000 -0.0138 0.0000 -0.0138 0.0000 -0.0138
250.000 9.8425
265.000 10.4331
0.000 -0.200 0.000 -0.050 0.000 -0.350 0.000 -0.350 0.000 -0.350 0.000 -0.350 0.0000 -0.0079 0.0000 -0.0020 0.0000 -0.0138 0.0000 -0.0138 0.0000 -0.0138 0.0000 -0.0138
265.000 10.4331
315.000 12.4016
0.000 -0.200 0.000 -0.050 0.000 -0.350 0.000 -0.350 0.000 -0.350 0.000 -0.350 0.0000 -0.0079 0.0000 -0.0020 0.0000 -0.0138 0.0000 -0.0138 0.0000 -0.0138 0.0000 -0.0138
315.000 12.4016
500.000 19.6850
0.000 -0.250 0.000 -0.050 0.000 -0.350 0.0000 -0.0098 0.0000 -0.0020 0.0000 -0.0138
– –
– –
– –
– –
– –
– –
500.000 19.6850
630.000 24.8031
0.000 -0.250 0.000 -0.350 0.000 -0.350 0.0000 -0.0098 0.0000 -0.0138 0.0000 -0.0138
– –
– –
– –
– –
– –
– –
630.000 1200.000 0.000 -0.300 24.8031 47.2441 0.0000 -0.0118
– –
– –
0.000 -0.350 0.0000 -0.0138
– –
– –
– –
– –
– –
– –
1200.000 1600.000 0.000 -0.350 47.2441 62.9921 0.0000 -0.0138
– –
– –
0.000 -0.350 0.0000 -0.0138
– –
– –
– –
– –
– –
– –
1600.000 62.9921
– –
– –
– –
– –
– –
– –
– –
– –
– –
TIMKEN TAPERED ROLLER BEARING CATALOG
0.000 -0.350 0.0000 -0.0138
– –
– –
ENGINEERING METRIC SYSTEM TOLERANCES
Table 5. tapered roller bearing tolerances – Inner Ring stand (Metric) Bearing Types
TS TSF
Standard Bearing Class
Bore
K
Precision Bearing Class
N
C
B
A
AA
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
10.000 0.3937
80.000 3.1496
80.000 3.1496
120.000 +0.100 -0.100 +0.050 0.000 +0.100 -0.100 4.7244 +0.0039 -0.0039 +0.0020 0.0000 +0.0039 -0.0039
120.000 4.7244
180.000 +0.150 -0.150 +0.050 0.000 +0.100 -0.100 7.0866 +0.0059 -0.0059 +0.0020 0.0000 +0.0039 -0.0039
+0.100 0.000 +0.050 0.000 +0.100 -0.100 +0.0039 0.0000 +0.0020 0.0000 +0.0039 -0.0039
180.000 7.0866
250.000 +0.150 -0.150 +0.050 0.000 +0.100 -0.150 9.8425 +0.0059 -0.0059 +0.0020 0.0000 +0.0039 -0.0059
250.000 9.8425
265.000 +0.150 -0.150 +0.100 0.000 +0.100 -0.150 10.4331 +0.0059 -0.0059 +0.0039 0.0000 +0.0039 -0.0059
265.000 10.4331
315.000 +0.150 -0.150 +0.100 0.000 +0.100 -0.150 12.4016 +0.0059 -0.0059 +0.0039 0.0000 +0.0039 -0.0059
315.000 12.4016
400.000 +0.200 -0.200 +0.100 0.000 +0.150 -0.150 15.7480 +0.0079 -0.0079 +0.0039 0.0000 +0.0059 -0.0059
400.000 15.7480
– –
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
– –
– –
– –
– –
(1)
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
Inner Ring Stand. Inner Ring stand is a measure of the variation in Inner Ring raceway size, taper and roller diameter. This is checked by measuring the axial location of the reference surface of a master outer ring or other type gauge with respect to the reference Inner Ring face.
(1)These sizes manufactured as matched assemblies only.
TIMKEN TAPERED ROLLER BEARING CATALOG
21
ENGINEERING METRIC SYSTEM TOLERANCES
Table 6. tapered roller bearing tolerances – Outer ring width (Metric) Bearing Types
TS TSF
Standard Bearing Class
O.D.
K
Precision Bearing Class
N
C
B
A
AA
Over
Incl.
Max.
Min.(1)
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
10.000 0.3937
80.000 3.1496
0.000 -0.150 0.000 -0.100 0.000 -0.150 0.000 -0.150 0.000 -0.150 0.000 -0.150 0.0000 -0.0059 0.0000 -0.0040 0.0000 -0.0059 0.0000 -0.0059 0.0000 -0.0059 0.0000 -0.0059
80.000 3.1496
150.000 5.9055
0.000 -0.200 0.000 -0.100 0.000 -0.200 0.000 -0.200 0.000 -0.200 0.000 -0.200 0.0000 -0.0079 0.0000 -0.0040 0.0000 -0.0079 0.0000 -0.0079 0.0000 -0.0079 0.0000 -0.0079
150.000 5.9055
180.000 7.0866
0.000 -0.200 0.000 -0.100 0.000 -0.250 0.000 -0.250 0.000 -0.250 0.000 -0.250 0.0000 -0.0079 0.0000 -0.0040 0.0000 -0.0098 0.0000 -0.0098 0.0000 -0.0098 0.0000 -0.0098
180.000 7.0866
250.000 9.8425
0.000 -0.250 0.000 -0.100 0.000 -0.250 0.000 -0.250 0.000 -0.250 0.000 -0.250 0.0000 -0.0098 0.0000 -0.0040 0.0000 -0.0098 0.0000 -0.0098 0.0000 -0.0098 0.0000 -0.0098
250.000 9.8425
265.000 10.4331
0.000 -0.250 0.000 -0.100 0.000 -0.300 0.000 -0.300 0.000 -0.300 0.000 -0.300 0.0000 -0.0098 0.0000 -0.0040 0.0000 -0.0118 0.0000 -0.0118 0.0000 -0.0118 0.0000 -0.0118
265.000 10.4331
315.000 12.4016
0.000 -0.250 0.000 -0.100 0.000 -0.300 0.000 -0.300 0.000 -0.300 0.000 -0.300 0.0000 -0.0098 0.0000 -0.0040 0.0000 -0.0118 0.0000 -0.0118 0.0000 -0.0118 0.0000 -0.0118
315.000 12.4016
400.000 15.7480
0.000 -0.250 0.000 -0.100 0.000 -0.300 0.000 -0.300 0.0000 -0.0098 0.0000 -0.0040 0.0000 -0.0118 0.0000 -0.0118
400.000 15.7480
500.000 19.6850
0.000 -0.300 0.000 -0.100 0.000 -0.350 0.0000 -0.0118 0.0000 -0.0040 0.0000 -0.0138
– –
500.000 19.6850
800.000 31.4961
0.000 -0.300 0.000 -0.100 0.000 -0.350 0.0000 -0.0118 0.0000 -0.0040 0.0000 -0.0138
800.000 31.4961
1200.000 0.000 -0.350 47.2441 0.0000 -0.0138
– –
– –
1200.000 1600.000 0.000 -0.400 47.2441 62.9921 0.0000 -0.0157
– –
– –
– –
– –
1600.000 62.9921
– –
0.000 -0.400 0.0000 -0.0157
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
0.000 -0.400 0.0000 -0.0157
– –
– –
– –
– –
– –
– –
0.000 -0.400 0.0000 -0.0157
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
(1)These differ slightly from tolerances in ISO 492. These differences normally have an insignificant effect on the mounting and performance of tapered roller bearings. The 30000 series ISO bearings also are available with the above parameter according to ISO 492.
22
TIMKEN TAPERED ROLLER BEARING CATALOG
ENGINEERING METRIC SYSTEM TOLERANCES
Table 7. tapered roller bearing tolerances – Outer ring stand (Metric) Bearing Types
TS TSF(1)
Standard Bearing Class
Bore
K
Precision Bearing Class
N
C
B
A
AA
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
10.000 0.3937
18.000 0.7087
+0.100 0.000 +0.050 0.000 +0.100 -0.100 +0.0039 0.0000 +0.0020 0.0000 +0.0039 -0.0039
18.000 0.7087
80.000 3.1496
+0.100 0.000 +0.050 0.000 +0.100 -0.100 +0.0039 0.0000 +0.0020 0.0000 +0.0039 -0.0039
80.000 3.1496
120.000 +0.100 -0.100 +0.050 0.000 +0.100 -0.100 4.7244 +0.0039 -0.0039 +0.0020 0.0000 +0.0039 -0.0039
120.000 4.7244
265.000 +0.200 -0.100 +0.100 0.000 +0.100 -0.150 10.4331 +0.0079 -0.0039 +0.0039 0.0000 +0.0039 -0.0059
265.000 10.4331
315.000 +0.200 -0.100 +0.100 0.000 +0.100 -0.150 12.4016 +0.0079 -0.0039 +0.0039 0.0000 +0.0039 -0.0059
315.000 12.4016
400.000 +0.200 -0.200 +0.100 0.000 +0.100 -0.150 15.7480 +0.0079 -0.0079 +0.0039 0.0000 +0.0039 -0.0059
315.000 12.4016
400.000 +0.200 -0.200 +0.100 0.000 +0.150 -0.150 15.7480 +0.0079 -0.0079 +0.0040 0.0000 +0.0059 -0.0059
400.000 15.7480
– –
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
– –
– –
– –
– –
(2)
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
Outer Ring Stand. Outer ring stand is a measure of the variation in outer ring I.D. size and taper. This is checked by measuring the axial location of the reference surface of a master plug or other type gauge with respect to the reference face of the outer ring.
(1)Stand for flanged outer ring is measured from flange backface (seating face). (2)These sizes manufactured as matched assemblies only.
TIMKEN TAPERED ROLLER BEARING CATALOG
23
ENGINEERING METRIC SYSTEM TOLERANCES
Table 8. tapered roller bearing tolerances – overall bearing width (Metric) Bearing Types
TS TSF(1)
SR(2)
Standard Bearing Class
Bore
K
Precision Bearing Class
N
C
B
A
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
10.000 0.3937
80.000 3.1496
80.000 3.1496
120.000 +0.200 -0.200 +0.100 0.000 +0.200 -0.200 +0.200 -0.200 +0.200 -0.200 +0.200 -0.200 4.7244 +0.0078 -0.0078 +0.0039 0.0000 +0.0078 -0.0078 +0.0078 -0.0078 +0.0078 -0.0078 +0.0078 -0.0078
120.000 4.7244
180.000 +0.350 -0.250 +0.150 0.000 +0.350 -0.250 +0.200 -0.250 +0.200 -0.250 +0.200 -0.250 7.0866 +0.0137 -0.0098 +0.0059 0.0000 +0.0137 -0.0098 +0.0078 -0.0098 +0.0078 -0.0098 +0.0078 -0.0098
180.000 7.0866
250.000 +0.350 -0.250 +0.150 0.000 +0.350 -0.250 +0.200 -0.300 +0.200 -0.300 +0.200 -0.300 9.8425 +0.0137 -0.0098 +0.0059 0.0000 +0.0137 -0.0098 +0.0078 -0.0118 +0.0078 -0.0118 +0.0078 -0.0118
250.000 9.8425
265.000 +0.350 -0.250 +0.200 0.000 +0.350 -0.300 +0.200 -0.300 +0.200 -0.300 +0.200 -0.300 10.4331 +0.0137 -0.0098 +0.0078 0.0000 +0.0137 -0.0118 +0.0078 -0.0118 +0.0078 -0.0118 +0.0078 -0.0118
265.000 10.4331
315.000 +0.350 -0.250 +0.200 0.000 +0.350 -0.300 +0.200 -0.300 +0.200 -0.300 +0.200 -0.300 12.4016 +0.0137 -0.0098 +0.0078 0.0000 +0.0137 -0.0118 +0.0078 -0.0118 +0.0078 -0.0118 +0.0078 -0.0118
315.000 12.4016
500.000 +0.400 -0.400 +0.200 0.000 +0.350 -0.300 19.6850 +0.0157 -0.0157 +0.0078 0.0000 +0.0137 -0.0118
– –
– –
– –
– –
– –
– –
500.000 19.6850
800.000 +0.400 -0.400 31.4961 +0.0157 -0.0157
– –
– –
+0.350 -0.400 +0.0137 -0.0157
– –
– –
– –
– –
– –
– –
800.000 1000.000 +0.450 -0.450 31.4961 39.3701 +0.0177 -0.0177
– –
– –
+0.350 -0.400 +0.0137 -0.0157
– –
– –
– –
– –
– –
– –
1000.000 1200.000 +0.450 -0.450 39.3701 47.2441 +0.0177 -0.0177
– –
– –
+0.350 -0.450 +0.0137 -0.0177
– –
– –
– –
– –
– –
– –
1200.000 1600.000 +0.450 -0.450 47.2441 62.9921 +0.0177 -0.0177
– –
– –
+0.350 -0.500 +0.0137 -0.0196
– –
– –
– –
– –
– –
– –
1600.000 62.9921
– –
– –
– –
– –
– –
– –
– –
– –
180.000 7.0866
+0.200 0.000 +0.100 0.000 +0.200 -0.200 +0.200 -0.200 +0.200 -0.200 +0.200 -0.200 +0.0078 0.0000 +0.0039 0.0000 +0.0078 -0.0078 +0.0078 -0.0078 +0.0078 -0.0078 +0.0078 -0.0078
+0.450 -0.450 +0.0177 -0.0177 250.000 9.8425
– –
– –
0.000 -0.200 0.000 -0.050 0.000 -0.350 0.000 -0.350 0.000 -0.350 0.000 -0.350 0.0000 -0.0079 0.0000 -0.0020 0.0000 -0.0138 0.0000 -0.0138 0.0000 -0.0138 0.0000 -0.0138
(1)For bearing type TSF, the tolerance applies to the dimension T1. Refer to the TSF data in this catalog. (2)SR assemblies are manufactured to tolerance class N only.
24
AA
Over
TIMKEN TAPERED ROLLER BEARING CATALOG
ENGINEERING METRIC SYSTEM TOLERANCES
Table 9. Tapered Roller Bearing Tolerances – Radial Runout (Metric) Bearing Types
TS TSF SR(1)
Standard Bearing Class
O.D.
Precision Bearing Class
Over
Incl.
K
B
A
AA
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
10.000 0.3937
18.000 0.7087
– –
– –
– –
– –
0.002 0.00008
0.001 0.00004
18.000 0.7087
30.000 1.1811
0.018 0.0007
0.018 0.0007
0.005 0.0002
0.003 0.0001
0.002 0.00008
0.001 0.00004
30.000 1.1811
50.000 1.9685
0.020 0.0008
0.020 0.0008
0.006 0.0002
0.003 0.0001
0.002 0.00008
0.001 0.00004
50.000 1.9685
80.000 3.1496
0.025 0.0010
0.025 0.0010
0.006 0.0002
0.004 0.0002
0.002 0.00008
0.001 0.00004
80.000 3.1496
120.000 4.7244
0.035 0.0014
0.035 0.0014
0.006 0.0002
0.004 0.0002
0.002 0.00008
0.001 0.00004
120.000 4.7244
150.000 5.9055
0.040 0.0016
0.040 0.0016
0.007 0.0003
0.004 0.0002
0.002 0.00008
0.001 0.00004
150.000 5.9055
180.000 7.0866
0.045 0.0018
0.045 0.0018
0.008 0.0003
0.004 0.0002
0.002 0.00008
0.001 0.00004
180.000 7.0866
250.000 9.8425
0.050 0.0020
0.050 0.0020
0.010 0.0004
0.005 0.0002
0.002 0.00008
0.001 0.00004
250.000 9.8425
265.000 10.4331
0.060 0.0024
0.060 0.0024
0.011 0.0004
0.005 0.0002
0.002 0.00008
0.001 0.00004
265.000 10.4331
315.000 12.4016
0.060 0.0024
0.060 0.0024
0.011 0.0004
0.005 0.0002
0.002 0.00008
0.001 0.00004
315.000 12.4016
400.000 15.7480
0.070 0.0028
0.070 0.0028
0.013 0.0005
0.005 0.0002
– –
– –
400.000 15.7480
500.000 19.6850
0.080 0.0031
0.080 0.0031
– –
– –
– –
– –
500.000 19.6850
630.000 24.8031
0.100 0.0039
– –
– –
– –
– –
– –
630.000 24.8031
800.000 31.4961
0.120 0.0047
– –
– –
– –
– –
– –
800.000 1000.000 31.4961 39.3701
0.140 0.0055
– –
– –
– –
– –
– –
1000.000 1200.000 39.3701 47.2441
0.160 0.0063
– –
– –
– –
– –
– –
1200.000 1600.000 47.2441 62.9921
0.180 0.0071
– –
– –
– –
– –
– –
1600.000 2000.000 62.9921 78.7402
0.200 0.0079
– –
– –
– –
– –
– –
0.200 0.0079
– –
– –
– –
– –
– –
2000.000 78.7402
– –
N
C
Runout. Runout is a measure of rotational accuracy expressed by Total Indicator Reading (T.I.R.). Total displacement is measured by an instrument sensing against a moving surface, or moved with respect to a fixed surface. A radial runout measurement includes both roundness errors and the centering error of the surface that the instrument head senses against.
(1)SR assemblies are manufactured to tolerance class N only.
TIMKEN TAPERED ROLLER BEARING CATALOG
25
ENGINEERING INCH SYSTEM TOLERANCES
Inch system Tolerances Inch system bearings are manufactured to a number of tolerance classes. Classes 4 and 2 are often referred to as standard classes. Classes 3, 0, 00 and 000 are precision classes. Inch system bearings conform to ABMA standard 19.2. Table 10. Tapered Roller Bearing Tolerances – Inner Ring Bore (Inch) Bearing Types
TS TSF TSL(1) TDI TDIT TDO TNA
Standard Bearing Class
Bore
4
Precision Bearing Class
2
3
0
00
000
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
76.200 3.0000
76.200 3.0000
304.800 +0.025 0.000 +0.025 0.000 +0.013 0.000 +0.013 0.000 +0.008 0.000 +0.008 0.000 12.0000 +0.0010 0.0000 +0.0010 0.0000 +0.0005 0.0000 +0.0005 0.0000 +0.0003 0.0000 +0.0003 0.0000
304.800 12.0000
609.600 24.0000
609.600 24.0000
914.400 +0.076 0.000 36.0000 +0.0030 0.0000
– –
– –
914.400 1219.200 +0.102 0.000 36.0000 48.0000 +0.0040 0.0000
– – – –
– –
1219.200 48.0000
+0.013 0.000 +0.013 0.000 +0.013 0.000 +0.013 0.000 +0.008 0.000 +0.008 0.000 +0.0005 0.0000 +0.0005 0.0000 +0.0005 0.0000 +0.0005 0.0000 +0.0003 0.0000 +0.0003 0.0000
– –
– –
+0.127 0.000 +0.0050 0.0000
– –
– –
– –
– –
– –
– –
+0.038 0.000 +0.0015 0.0000
– –
– –
– –
– –
– –
– –
– –
+0.051 0.000 +0.0020 0.0000
– –
– –
– –
– –
– –
– –
– –
+0.076 0.000 +0.0030 0.0000
– –
– –
– –
– –
– –
– –
+0.051 0.000 +0.025 0.000 +0.0020 0.0000 +0.0010 0.0000
(1)For TSL bearings these are the normal tolerances of inner ring bore. However, bore size can be slightly reduced at large end due to tight fit assembly of the seal on the rib. This should not have any effect on the performance of the bearing.
Table 11. Tapered Roller Bearing Tolerances – Outer ring Outside Diameter (Inch) Bearing Types
TS TSF TSL TDI TDIT TDO TNA TNASW TNASWE
26
Standard Bearing Class
O.D.
4
Precision Bearing Class
2
3
0
00
000
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
304.800 +0.025 0.000 +0.025 0.000 +0.013 0.000 +0.013 0.000 +0.008 0.000 +0.008 0.000 12.0000 +0.0010 0.0000 +0.0010 0.0000 +0.0005 0.0000 +0.0005 0.0000 +0.0003 0.0000 +0.0003 0.0000
304.800 12.0000
609.600 +0.051 0.000 +0.051 0.000 +0.025 0.000 24.0000 +0.0020 0.0000 +0.0020 0.0000 +0.0010 0.0000
– –
– –
– –
– –
– –
– –
609.600 24.0000
914.400 +0.076 0.000 +0.076 0.000 +0.038 0.000 36.0000 +0.0030 0.0000 +0.0030 0.0000 +0.0015 0.0000
– –
– –
– –
– –
– –
– –
– –
– –
+0.051 0.000 +0.0020 0.0000
– –
– –
– –
– –
– –
– –
– –
– –
+0.076 0.000 +0.0030 0.0000
– –
– –
– –
– –
– –
– –
914.400 1219.200 +0.102 0.000 36.0000 48.0000 +0.0040 0.0000 1219.200 48.0000
– –
TIMKEN TAPERED ROLLER BEARING CATALOG
+0.127 0.000 +0.0050 0.0000
ENGINEERING INCH SYSTEM TOLERANCES
Table 12. Tapered Roller Bearing Tolerances – Outer ring Flange (Inch) Bearing Types
TSF
Standard Bearing Class
O.D.
4
Precision Bearing Class
2
3
0
00
000
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
304.800 +0.051 0.000 +0.052 0.000 +0.051 0.000 +0.051 0.000 +0.051 0.000 +0.051 0.000 12.0000 +0.0020 0.0000 +0.0020 0.0000 +0.0020 0.0000 +0.0020 0.0000 +0.0020 0.0000 +0.0020 0.0000
304.800 12.0000
609.600 +0.076 0.000 +0.076 0.000 +0.076 0.000 +0.051 0.000 +0.051 0.000 +0.051 0.000 24.0000 +0.0030 0.0000 +0.0030 0.0000 +0.0030 0.0000 +0.0020 0.0000 +0.0020 0.0000 +0.0020 0.0000
609.600 24.0000
914.400 +0.102 0.000 +0.102 0.000 +0.102 0.000 36.0000 +0.0040 0.0000 +0.0040 0.0000 +0.0040 0.0000 – –
914.400 36.0000
+0.127 0.000 +0.0050 0.0000
– –
– –
+0.127 0.000 +0.0050 0.0000
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
Table 13. Tapered Roller Bearing Tolerances – Inner Ring Width (Inch) Bearing Types
TS TSF TSL 2S TDI TDIT TDO
Standard Bearing Class
Bore
4
Precision Bearing Class
2
3
0
00
000
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
All Sizes
+0.076 -0.254 +0.076 -0.254 +0.076 -0.254 +0.076 -0.254 +0.076 -0.254 +0.076 -0.254 +0.0030 -0.0100 +0.0030 -0.0100 +0.0030 -0.0100 +0.0030 -0.0100 +0.0030 -0.0100 +0.0030 -0.0100
Table 14. Tapered Roller Bearing Tolerances – Outer ring width (Inch) Bearing Types
All Types
Standard Bearing Class
O.D.
4
Precision Bearing Class
2
3
0
00
000
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
All Sizes
+0.051 -0.254 +0.051 -0.254 +0.051 -0.254 +0.051 -0.254 +0.051 -0.254 +0.051 -0.254 +0.0020 -0.0100 +0.0020 -0.0100 +0.0020 -0.0100 +0.0020 -0.0100 +0.0020 -0.0100 +0.0020 -0.0100
TIMKEN TAPERED ROLLER BEARING CATALOG
27
ENGINEERING INCH SYSTEM TOLERANCES
Table 15. Tapered Roller Bearing Tolerances – Inner Ring Stand (Inch) Bearing Types
Standard Bearing Class
Bore
4
Precision Bearing Class
2
3
0
00
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
(2)
(2)
(2)
(2)
(2)
(2) – –
– –
– –
– –
0.000 101.600 +0.102 0.000 +0.102 0.000 +0.102 -0.102 0.0000 4.0000 +0.0040 0.0000 +0.0040 0.0000 +0.0040 -0.0040 Inner Ring Stand. Inner Ring stand is a measure of the variation in Inner Ring raceway size, taper and roller diameter. This is checked by measuring the axial location of the reference surface of a master outer ring or other type gauge with respect to the reference Inner Ring face.
TS TSF TSL 2S TDI(1) TDIT(1) TDO
000
Over
101.600 266.700 +0.152 -0.152 +0.102 0.000 +0.102 +0.102 4.0000 10.5000 +0.0060 -0.0060 +0.0040 0.0000 +0.0040 -0.0040 266.700 304.800 +0.152 -0.152 +0.102 0.000 +0.102 -0.102 10.5000 12.0000 +0.0060 -0.0060 +0.0040 0.0000 +0.0040 -0.0040 304.800 406.400 12.0000 16.0000 – –
406.400 16.0000
– –
– –
(2)
(2)
+0.178 -0.178 +0.178 -0.178 +0.0070 -0.0070 +0.0070 -0.0070 (2)
(2)
(2)
(2)
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
(1)For class 2, TDI and TDIT bearings with an inner ring bore of 101.600 to 304.800 mm (4.0000 to 12.0000 in.), the inner ring stand
is ±0.102 mm (±0.0040 in.).
(2)These sizes manufactured as matched assemblies only.
Table 16. Tapered Roller Bearing Tolerances – Outer ring Stand (Inch) Bearing Types
Standard Bearing Class
Bore
4
Precision Bearing Class
2
3
0
00
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
(2)
(2)
(2)
(2)
– –
– –
– –
– –
0.000 101.600 +0.102 0.000 +0.102 0.000 +0.102 -0.102 0.0000 4.0000 +0.0040 0.0000 +0.0040 0.0000 +0.0040 -0.0040 Outer Ring Stand. Outer ring stand is a measure of the variation in outer ring I.D. size and taper. This is checked by measuring the axial location of the reference surface of a master plug or other type gauge with respect to the reference face of the outer ring.
101.600 266.700 +0.203 -0.102 +0.102 0.000 +0.102 -0.102 4.0000 10.5000 +0.0080 -0.0040 +0.0040 0.0000 +0.0040 -0.0040
TS TSF(1) 266.700 304.800 +0.203 TSL 10.5000 12.0000 +0.0080 TDI TDIT 304.800 406.400 +0.203 12.0000 16.0000 +0.0080 406.400 16.0000
– –
(2)
-0.203 +0.203 -0.203 +0.203 -0.203 -0.0080 +0.0080 -0.0080 +0.0080 -0.0080 (2)
(2)
(2)These sizes manufactured as matched assemblies only.
TIMKEN TAPERED ROLLER BEARING CATALOG
(2)
(2)
-0.102 +0.102 0.000 +0.102 -0.102 -0.0040 +0.0040 0.0000 +0.0040 -0.0040
(2)
(2)
(2)
(1)Stand for flanged outer ring is measured from flange backface (seating face).
28
000
Over
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
ENGINEERING METRIC INCH SYSTEM TOLERANCES
Table 17. Tapered Roller Bearing tolerances – Radial Runout (Inch) Bearing Types
TS TSF TSL 2S TDI TDIT TDO TNA TNASW TNASWE
Standard Bearing Class
O.D.
Precision Bearing Class
Over
Incl.
4
2
3
0
00
000
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
266.700 10.5000
0.051 0.0020
0.038 0.0015
0.008 0.0003
0.004 0.00015
0.002 0.00075
0.001 0.00040
266.700 10.5000
304.800 12.0000
0.051 0.0020
0.038 0.0015
0.008 0.0003
0.004 0.00015
0.002 0200075
0.001 0.00040
304.800 12.0000
609.600 24.0000
0.051 0.0020
0.038 0.0015
0.018 0.0007
– –
– –
– –
609.600 24.0000
914.400 36.0000
0.076 0.0030
0.051 0.0020
0.051 0.0020
– –
– –
– –
914.400 36.0000
– –
0.076 0.0030
– –
0.076 0.0030
– –
– –
– –
Runout. Runout is a measure of rotational accuracy expressed by Total Indicator Reading (T.I.R.). Total displacement is measured by an instrument sensing against a moving surface, or moved with respect to a fixed surface. A radial runout measurement includes both roundness errors and the centering error of the surface that the instrument head senses against.
TIMKEN TAPERED ROLLER BEARING CATALOG
29
ENGINEERING inch SYSTEM TOLERANCES
Table 18. Tapered Roller Bearing tolerances – Overall Bearing Width (Inch) Bearing Types
Bore
Standard Bearing Class
O.D.
4
Precision Bearing Class
2
3
0
00
000
Over
Incl.
Over
Incl.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
101.600 4.0000
– –
– –
+0.203 +0.0080
0.000 0.0000
+0.203 +0.0080
0.000 0.0000
+0.203 +0.0080
-0.203 -0.0080
+0.203 +0.0080
-0.203 -0.0080
+0.203 +0.0080
-0.203 -0.0080
+0.203 +0.0080
-0.203 -0.0080
101.600 304.800 4.0000 12.0000
– –
– –
+0.356 +0.0140
-0.254 -0.0100
+0.203 +0.0080
0.000 0.0000
+0.203 +0.0080
-0.203 -0.0080
+0.203 +0.0080
-0.203 -0.0080
+0.203 +0.0080
-0.203 -0.0080
+0.203 +0.0080
-0.203 -0.0080
304.800 609.600 12.0000 24.0000
0.000 0.0000
508.000 20.0000
– –
– –
+0.381 +0.0150
-0.381 -0.0150
+0.203 +0.0080
-0.203 -0.0080
– –
– –
– –
– –
– –
– –
304.800 609.600 12.0000 24.0000
508.000 20.0000
– –
– –
– –
+0.381 +0.0150
-0.381 -0.0150
+0.381 +0.0150
-0.381 -0.0150
– –
– –
– –
– –
– –
– –
– –
– –
+0.381 +0.0150
-0.381 -0.0150
– –
– –
+0.381 +0.0150
-0.381 -0.0150
– –
– –
– –
– –
– –
– –
0.000 127.000 0.0000 5.0000 TNA TNASW – TNASWE 127.000 5.0000 –
– –
– –
– –
– –
+0.254 +0.0100
0.000 0.0000
+0.254 +0.0100
0.000 0.0000
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
+0.762 +0.0300
0.000 0.0000
+0.762 +0.0300
0.000 0.0000
– –
– –
– –
– –
– –
– –
0.000 0.0000
101.600 4.0000
– –
– –
+0.406 +0.0160
0.000 0.0000
+0.406 +0.0160
0.000 0.0000
+0.406 +0.0160
-0.406 -0.0160
+0.406 +0.0160
-0.406 -0.0160
+0.406 +0.0160
-0.406 -0.0160
+0.406 +0.0160
-0.406 -0.0160
101.600 304.800 4.0000 12.0000
– –
– –
+0.711 +0.0280
-0.508 -0.0200
+0.406 +0.0160
-0.203 -0.0080
+0.406 +0.0160
-0.406 -0.0160
+0.406 +0.0160
-0.406 -0.0160
+0.406 +0.0160
-0.406 -0.0160
+0.406 +0.0160
-0.406 -0.0160
304.800 609.600 12.0000 24.0000
0.000 0.0000
508.000 20.0000
– –
– –
+0.762 +0.0300
-0.762 -0.0300
+0.406 +0.0160
-0.406 -0.0160
– –
– –
– –
– –
– –
– –
304.800 609.600 12.0000 24.0000
508.000 20.0000
– –
– –
– –
+0.762 +0.0300
-0.762 -0.0300
+0.762 +0.0300
-0.762 -0.0300
– –
– –
– –
– –
– –
– –
TS TSF(1) TSL
609.600 24.0000
TDI TDIT TDO
2S
– –
609.600 24.0000
– –
– –
– –
+0.762 +0.0300
-0.762 -0.0300
– –
– –
+0.762 +0.0300
-0.762 -0.0300
– –
– –
– –
– –
– –
– –
0.000 0.0000
101.600 4.0000
– –
– –
+0.457 +0.0180
-0.051 -0.0020
+0.457 +0.0180
-0.051 -0.0020
– –
– –
– –
– –
– –
– –
– –
– –
(1)For bearing type TSF, the tolerance applies to the dimension T1. Refer to the TSF data tables in this catalog.
30
TIMKEN TAPERED ROLLER BEARING CATALOG
ENGINEERING inch SYSTEM TOLERANCES
Table 19. Thrust Tapered Roller Bearing Tolerances – Bore (Inch) TTC, TTSP – Class 4
TTHD, TTHDFL, TTVS Bore
Bearing Class Precision 2
Range
TTHD, TTHDFL, TTVS
Precision 3
Bore
Deviation
Range
Precision 4
Over
Incl.
Over
Incl.
Max.
Min.
Over
Incl.
Over
Incl.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
304.800 12.0000
+0.025 +0.0010
0.000 0.0000
+0.013 +0.0005
0.000 0.0000
0.000 0.0000
25.400 1.0000
+0.076 +0.0030
-0.076 -0.0030
304.800 12.0000
609.600 24.0000
+0.051 0.0020
0.000 0.0000
+0.025 +0.0010
0.000 0.0000
25.400 1.0000
76.200 3.0000
+0.102 +0.0040
-0.102 -0.0040
609.600 24.0000
914.400 36.0000
+0.076 +0.0030
0.000 0.0000
+0.038 +0.0015
0.000 0.0000
76.200 3.0000
– –
+0.127 +0.0050
-0.127 -0.0050
914.400 36.0000
1219.200 48.0000
+0.102 +0.0040
0.000 0.0000
+0.051 0.0020
0.000 0.0000
1219.200 48.0000
– –
+0.127 +0.0050
0.000 0.0000
+0.076 +0.030
0.000 0.0000
TTC, TTSP
Table 20. Thrust Tapered Roller Bearing Tolerances – outside diameter (Inch) TTHD, TTHDFL, TTVS Outside Diameter
TTHD, TTHDFL, TTVS
Bearing Class Precision 2
Range
TTC, TTSP – Class 4 Outside Diameter
Deviation
Range
Precision 4
Precision 3
Over
Incl.
Over
Incl.
Max.
Min.
Over
Incl.
Over
Incl.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
304.800 12.0000
+0.025 +0.0010
0.000 0.0000
+0.013 +0.0005
0.000 0.0000
0.000 0.0000
127.000 5.0000
+0.254 +0.0100
0.000 0.0000
304.800 12.0000
609.600 24.0000
+0.051 0.0020
0.000 0.0000
+0.025 +0.0010
0.000 0.0000
127.000 5.0000
203.200 8.0000
+0.381 +0.0150
0.000 0.0000
609.600 24.0000
914.400 36.0000
+0.076 +0.0030
0.000 0.0000
+0.038 +0.0015
0.000 0.0000
203.200 8.0000
– –
+0508 +0.200
0.000 0.0000
TTC, TTSP
Table 21. Thrust Tapered Roller Bearing Tolerances – width (Inch) TTHD, TTHDFL, TTVS Width
Precision 2
Range
TTHDFL
TTC, TTSP – Class 4
Bearing Class Precision 3
Width
Deviation
Range
Precision 4
Over
Incl.
Over
Incl.
Max.
Min.
Over
Incl.
Over
Incl.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
+0.381 +0.0150
-0.381 -0.0150
+0.203 +0.0080
-0.203 -0.0080
0.000 0.0000
76.200 3.0000
+0.254 +0.0100
-0.254 -0.0100
76.200 3.0000
127.000 5.0000
+0.381 +0.0150
-0.381 -0.0150
127.000 5.0000
– –
+0508 +0.200
-0.508 -0.0200
All Sizes
TTC, TTSP
TIMKEN TAPERED ROLLER BEARING CATALOG
31
ENGINEERING Mounting, fitting and setting
Tapered Roller Bearing mounting, fitting and setting Mounting
Fitting Practice
Tapered roller bearings are designed to take both radial and thrust loading. Under radial loads, a force is generated in the axial direction that must be counteracted. As a result, tapered roller bearings are normally adjusted against a second bearing. They can be mounted in either a direct or indirect mounting arrangement shown in fig. 9. For applications where a direct mounting arrangement is used and the outer ring is used to adjust the bearing setting, the outer ring is usually set in position by an outer-ring follower or mounted in an outer-ring carrier. See fig. 10.
General industrial application fitting practice standards for inner rings and outer rings are shown in the tables starting on page 38. These tables apply to solid or heavy-sectioned steel shafts, heavy-sectioned ferrous housings and normal operating conditions. To use the tables, it is necessary to determine if the member is rotating or stationary, the magnitude, direction and type of loading, and the shaft finish.
Effective bearing spread
Indirect mounting
Outer-ring follower
Outer-ring carrier
Cup follower
Carrier
Fig. 10. Bearing setting devices - direct mounting.
Effective bearing spread
Direct mounting Fig. 9. Comparison of mounting stability between indirect and direct mountings.
Locknuts Locknuts
Locknutwith with Locknut tonguedwasher washer tongued
Stake-nut Stakenut
End End plate plate
For indirect mountings, bearing setting is typically achieved by clamping against one of the inner rings. Various designs, including locknuts, stakenuts and end plates as shown in fig. 11 can be used. For applications requiring precision-class bearings, a special precision nut can be used. Backing shoulder diameters are listed for tapered roller bearings in the product data sections in this catalog. Locknuts
Locknut with tongued washer
Fig. 11. Bearing setting devices – indirect mounting.
32
TIMKEN TAPERED ROLLER BEARING CATALOG
Stake-nut
End pl
ENGINEERING MOUNTING, FITTING and SETTING
Certain table fits may not be adequate for light shaft and housing sections, shafts other than steel, nonferrous housings, critical operation conditions such as high speed, unusual thermal or loading conditions or a combination thereof. Also, assembly procedures and the means and ease of obtaining the bearing setting may require special fits. In these cases, experience should be used as a guideline or your Timken engineer should be consulted for review and suggestions. Rotating inner rings generally should be applied with an interference fit. In special cases, loose fits may be considered if it has been determined by test or experience they will perform satisfactorily. The term “rotating inner ring” describes a condition in which the inner ring rotates relative to the load. This may occur with a rotating inner ring under a stationary load or a stationary inner ring with a rotating load. Loose fits will permit the inner rings to creep and wear the shaft and the backing shoulder. This may result in excessive bearing looseness and possible bearing and shaft damage. Stationary inner ring fitting practice depends on the application. Under conditions of high speed, heavy loads or shock, interference fits using heavy-duty fitting practices should be used. With inner rings mounted on unground shafts subjected to moderate loads (no shock) and moderate speeds, a metal-to-metal or near zero average fit is used. In sheave and wheel applications using unground shafts, or in cases using ground shafts with moderate loads (no shock), a minimum fit near zero to a maximum looseness that varies with the inner ring bore size is suggested. In stationary inner ring applications requiring hardened and ground spindles, a slightly looser fit may be satisfactory. Special fits also may be necessary on installations such as multiple sheave crane blocks.
Rotating outer ring applications where the outer ring rotates relative to the load should always use an interference fit. Stationary, non-adjustable and fixed single-row outer ring applications should be applied with a tight fit wherever practical. Generally, adjustable fits may be used where the bearing setup is obtained by sliding the outer ring axially in the housing bore. However, in certain heavy-duty, high-load applications, tight fits are necessary to prevent pounding and plastic deformation of the housing. Tightly fitted outer rings mounted in carriers can be used. Tight fits should always be used when the load rotates relative to the outer ring. To permit through-boring when the outside diameters of singlerow bearings mounted at each end of a shaft are equal, and one is adjustable and the other fixed, it is suggested that the same adjustable fit be used at both ends. However, tight fits should be used if outer rings are backed against snap rings to prevent excessive dishing of snap rings, groove wear and possible loss of ring retention. Only outer rings with a maximum housing fillet radius requirement of 1.3 mm (0.05 in.) or less should be considered for a snap ring backing. Double-row stationary double outer rings are generally mounted with loose fits to permit assembly and disassembly. The loose fit also permits float when a floating bearing is mounted in conjunction with an axially fixed bearing on the other end of the shaft. Fitting practice tables 22-32 on pages 38-52, have been prepared for both metric and inch dimensions. For the inch system bearings, classes 4 and 2 (standard) have been included. The metric system bearings that have been included are: classes K and N (metric system standard bearings).
TIMKEN TAPERED ROLLER BEARING CATALOG
33
ENGINEERING MOUNTING, FITTING and SETTING
Effects of tight fits on bearing setting/width Interference fits of the inner ring cause inner ring expansion and interference fits of the outer ring cause outer ring contraction. As the inner ring diameters increase and the outer ring diameters decrease, internal clearance within the bearing is reduced and bearing width is increased. The change in clearance or setting is approximately equal to the change in width. For matched assemblies where the setting is pre-set from the factory and Set-Right assemblies, the effects of fit must be taken into account to provide the desired mounted setting. Double-row and four-row bearings that are provided with spacers are examples of matched assemblies. These bearings are pre-set to a specific bench endplay or axial clearance prior to installation into the application. Mounting the bearing with a tight fit will reduce this bench endplay. In order to meet the desired mounted setting, the bench endplay must be compensated for the fit effect.
For solid steel shafts and heavy-section steel housings, the change in setting is calculated as follows: Inner ring setting reduction/width increase:
( )( )
K = 0.5 0.39
d
S
do
Outer ring setting reduction/width increase: = 0.5
( )( ) K
Do
0.39 D
H
Interference fits on thin-walled shafts and light-section steel housings have a tendency to collapse the inner ring seat and stretch the outer ring seat, resulting in less change in bearing setting and overall width. The effects can be calculated according to the following formulas. Inner ring setting reduction/width increase:
( )
{ } [ ] { ] } ( )[ ( )] ( ) ] d
1
-
do d K = 0.5 Set-Right assemblies rely on the control of bearing, shaft and 0.39 2 dsi housing tolerances to known distributions, resulting in a statistical 1do mounted bearing setting range. This mounted setting takes into Outer ring setting reduction/width increase: account any reductions in setting due to tight fits. Do D Bearing width increase can affect setting in applications such as
( )
( )
2
dsi
S
( ) ( ) 1
-
2
DH K D outer-ring-adjusted, direct-mounting designs. In this case, a shim = 0.5 H 0.39 is inserted between the outer ring and a backing plate. Tight fits Do 2 1 will affect calculation of the shim thickness. In other applications DH where axial tolerance summation calculations are made, tight fit For shaft or housing material other than steel, consult your effects must be taken into consideration. Timken engineer.
Fig. 12. DH
34
TIMKEN TAPERED ROLLER BEARING CATALOG
do
d si
Do D
d
Parameters for calculation of fit effect on setting.
ENGINEERING MOUNTING, FITTING and SETTING
Setting Setting is defined as the axial clearance between roller and raceway. Establishing the setting at the time of assembly is an inherent advantage of tapered roller bearings. They can be set to provide optimum performance in almost any application. Fig. 13 gives an example of the relationship between fatigue life and bearing setting. Unlike some types of anti-friction bearings, tapered roller bearings do not rely strictly on housing or shaft fits to obtain a certain bearing setting. One ring can be moved axially relative to the other to obtain the desired bearing setting.
Rated life (percent)
100
-0.15 -0.10 -0.05 0.000 -0.006 -0.0040 -0.0020 0.00
0.05 0.10 0.15 mm 0.0020 0.0040 0.0060 in
Axial clearance 360 180 216
135
100
Load zone (degrees)
At assembly, the conditions of bearing setting are defined as:
Operating setting = mounted setting ± temperature effect + deflection Mounted EP or PL = bench EP or bench PL – effect of fits Operating setting = mounted EP or PL (MEP or MPL) + deflection ± temperature effect The temperature and fit effects will depend upon the type of mounting, bearing geometry and size, shaft and housing sizes, and material as defined in the following sections. Dimensional parameters affecting bearing setting are noted in fig. 15.
•• Preload (PL) – An axial interference
•• Line-to-line – A zero setting
There is an ideal bearing setting value for every application. To achieve this condition, the bearing setting must take into account deflection under load (radial + axial) as well as thermal expansions and material used.
2. Pre-set assemblies Axial Endplay
between rollers and raceways producing a measurable axial shaft movement when a small axial force is applied – first in one direction then in the other, while oscillating or rotating the shaft. See fig. 14. between rollers and raceways such that there is no measurable axial shaft movement when a small axial force is applied – in both directions – while oscillating or rotating the shaft.
The ambient bearing setting necessary to produce the optimum operating bearing setting varies with the application. Application experience or testing generally determines optimum settings. Frequently, however, the exact relationship of ambient to operating bearing setting is unknown and an educated estimate has to be made. To determine a suggested ambient bearing setting for a specific application, contact your Timken engineer.
1. Standard mounting
Fig. 13. Typical life vs. setting curve.
•• Endplay (EP) – An axial clearance
Bearing setting during operation is known as the operating bearing setting, and is a result of changes in the ambient bearing setting due to thermal expansion and deflections encountered during service.
Generally, the ideal operating bearing setting is near zero to maximize bearing life (fig. 13). Most bearings are set with endplay at assembly to reach the desired near-zero setting at operating temperature.
Preload Endplay 0
Bearing setting obtained during initial assembly and adjustment is the cold or ambient bearing setting, and is established before the equipment is subjected to service.
Fig. 14. Internal clearance – endplay.
condition: the transitional point between endplay and preload.
TIMKEN TAPERED ROLLER BEARING CATALOG
35
ENGINEERING MOUNTING, FITTING and SETTING
Fit effect (1) Solid shaft/heavy section housing
Setting Reduction/Width Increase for Single Inner Ring
= 0.5
( )( ) K 0.39
d do
S
Setting Reduction/Width Increase for Single Outer Ring = 0.5
( )( ) K
D
0.39
Do
H
Hollow shaft/thin-wall section
Shaft Reduction/Width Increase for Single Inner Ring
= 0.5
K
d
0.39
do
[
1 -
( ) ( ) dsi d dsi do
2 2
[
= 0.5 (1)These
( )( ) K
Do
0.39
D
[
( ) ( )
D DH 1 - Do DH 1 -
2 2
equations apply only to ferrous shaft and housing.
TIMKEN TAPERED ROLLER BEARING CATALOG
[
do
d si
Do D
d
S
Fig. 15. Dimensional parameters affecting fit and temperature effects on setting.
Shaft Reduction/Width Increase for Single Outer Ring
36
( )( )
1 -
DH
H
ENGINEERING MOUNTING, FITTING and SETTING
Temperature effect
Setting methods
Direct mounting - setting change due to temperature
Upper and lower limits of bearing setting values are determined by consideration of the following factors:
T = aTDT
[( )( ) ( )( ) [ K1
Do1
0.39
2
+
K2
Do2
0.39
2
+L
Indirect mounting - setting change due to temperature
T = aTDT
[( )( ) ( )( ) [ K1
Do1
0.39
2
1
2
+
K2
Do2
0.39
2
-L
1
2
L
L
Direct mounting
Indirect mounting Indirect mounting
Direct mounting
Fig. 16. Direct and indirect mounting.
•• Application type. •• Duty cycle/loading. •• Operational features of adjacent mechanical drive elements.
•• Changes in bearing setting due to temperature differentials and deflections.
•• Size of bearing and method of obtaining bearing setting. •• Lubrication method. •• Housing and shaft material. The setting value to be applied during assembly will depend on any changes that may occur during operation. In the absence of experience with bearings of similar size and operating conditions, a bearing setting range suggestion should be obtained from your Timken engineer.
TIMKEN TAPERED ROLLER BEARING CATALOG
37
ENGINEERING fitting practice TABLES These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Fitting Practice Tables tapered roller bearings Inner ring – Industrial Equipment Classes K and N (Metric)
Table 22. Tapered Roller Bearings – Inner ring Industrial Equipment Classes K and N (Metric) Inner Ring Bore Range
Deviation from nominal (maximum) bearing bore and resultant fit. T= Tight L = Loose
38
Tolerance
Rotating Inner Ring
Rotating or Stationary Inner Ring
Ground Seat
Unground Seat or Ground Seat
Constant Loads With Moderate Shock
Heavy Loads, High Speed or Shock
Inner Ring Seat Deviation
Resultant Fit
Inner Ring Seat Deviation
Resultant Fit
mm in.
mm in.
mm in.
mm in.
mm in.
18.000 0.7087
-0.012 0.000 -0.0005 0.0000
0.018 0.007 0.0007 0.0003
0.030T 0.007T 0.0012T 0.0003T
m6
+0.023 +0.012 +0.0009 +0.0005
0.035T 0.012T 0.0014T 0.0005T
n6
18.000 0.7087
30.000 1.1811
-0.012 0.000 -0.0005 0.0000
0.021 0.008 0.0008 0.0003
0.033T 0.008T 0.0013T 0.0003T
m6
+0.028 +0.015 +0.0011 +0.0006
0.040T 0.015T 0.0016T 0.0006T
n6
30.000 1.1811
50.000 1.9685
-0.012 0.000 -0.0005 0.0000
0.025 0.009 0.0010 0.0004
0.037T 0.009T 0.0015T 0.0004T
m6
+0.033 +0.017 +0.0013 +0.0007
0.045T 0.017T 0.0018T 0.0007T
n6
50.000 1.9685
80.000 3.1496
-0.015 0.000 -0.0006 0.0000
0.030 0.011 0.0012 0.0004
0.045T 0.011T 0.0018T 0.0005T
m6
+0.039 +0.020 +0.0015 +0.0008
0.054T 0.020T 0.0021T 0.0008T
n6
80.000 3.1496
120.000 4.7244
-0.020 0.000 -0.0008 0.0000
0.035 0.013 0.0014 0.0005
0.055T 0.013T 0.0022T 0.0005T
m6
+0.045 +0.023 +0.0019 +0.0010
0.065T 0.023T 0.0027T 0.0010T
n6
120.000 4.7244
180.000 7.0866
-0.025 0.000 -0.0010 0.0000
0.052 0.027 0.0020 0.0011
0.077T 0.027T 0.0030T 0.0011T
n6
+0.068 +0.043 +0.0027 +0.0017
0.093T 0.043T 0.0037T 0.0017T
p6
180.000 7.0866
200.000 7.8740
+0.106 +0.077 +0.0042 +0.0030
0.136T 0.077T 0.0054T 0.0030T
200.000 7.8740
225.000 8.8583
+0.109 +0.080 +0.0043 +0.0031
0.139T 0.080T 0.0055T 0.0031T
225.000 8.8583
250.000 9.8425
+0.113 +0.084 0.0044 +0.0033
0.143T 0.084T 0.0056T 0.0033T
250.000 9.8425
280.000 11.0236
+0.146 +0.094 +0.0057 +0.0037
0.181T 0.094T 0.0071T 0.0037T
280.000 11.0236
315.000 12.4016
+0.150 +0.098 +0.0059 +0.0039
0.185T 0.098T 0.0073T 0.0039T
Over
Incl.
mm in.
mm in.
10.000 0.3937
TIMKEN TAPERED ROLLER BEARING CATALOG
-0.030 0.000 -0.0012 0.0000
-0.035 0.000 -0.0014 0.0000
+0.060 +0.031 +0.0024 +0.0012
-0.035 0.000 +0.0026 +0.0013
0.090T 0.031T 0.0035T 0.0012T
-0.035 0.000 0.0040T 0.0013T
Symbol
n6
n6
Symbol
r6
r7
ENGINEERING fitting practice Tables These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Stationary Inner Ring Unground Seat
Ground Seat
Unground Seat
Hardened and Ground Seat
Moderate Loads, No Shock
Moderate Loads, No Shock
Sheaves, Wheels, Idlers
Wheel Spindles
Inner Ring Seat Deviation
Resultant Fit
Inner Ring Seat Deviation
Resultant Fit
Inner Ring Seat Deviation
Resultant Fit
Inner Ring Seat Deviation
Resultant Fit
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 -0.011 0.0000 -0.0004
0.012T 0.011L 0.0005T 0.0004L
h6
-0.006 -0.017 -0.0002 -0.0007
0.006T 0.017L 0.0002T 0.0007L
g6
-0.006 -0.017 -0.00025 -0.00065
0.006T 0.017L -0.00025T 0.00065L
g6
-0.016 -0.027 -0.0006 -0.0011
0.004L 0.027L 0.0002L 0.0011L
f6
0.000 -0.013 0.0000 -0.0005
0.012T 0.013L 0.0005T 0.0005L
h6
-0.007 -0.020 -0.0003 -0.0008
0.005T 0.020L 0.0002T 0.0008L
g6
-0.007 -0.020 -0.0003 -0.0008
0.005T 0.020L 0.0002T 0.0008L
g6
-0.020 -0.033 -0.0008 -0.0013
0.008L 0.033L 0.0003L 0.0013L
f6
0.000 -0.016 0.0000 -0.0006
0.012T 0.016L 0.0005T 0.0006L
h6
-0.009 -0.025 -0.0004 -0.0010
0.003T 0.025L 0.0001T 0.0010L
g6
-0.009 -0.025 -0.0004 -0.0010
0.003T 0.025L 0.0001T 0.0010L
g6
-0.025 -0.041 -0.0010 -0.0016
0.013L 0.041L 0.0005L 0.0016L
f6
0.000 -0.019 0.0000 -0.0007
0.015T 0.019L 0.0006T 0.0007L
h6
-0.010 -0.029 -0.0004 -0.0011
0.005T 0.029L 0.0002T 0.0011L
g6
-0.010 -0.029 -0.0004 -0.0011
0.005T 0.029L 0.0002T 0.0011L
g6
-0.030 -0.049 -0.0012 -0.0019
0.015L 0.049L 0.0006L 0.0019L
f6
0.000 -0.022 0.0000 -0.0009
0.020T 0.022L 0.0008T 0.0009L
h6
-0.012 -0.034 -0.0005 -0.0014
0.008T 0.034L 0.0003T 0.0014L
g6
-0.012 -0.034 -0.0005 -0.0014
0.008T 0.034L 0.0003T 0.0014L
g6
-0.036 -0.058 -0.0014 -0.0023
0.016L 0.058L 0.0006L 0.0023L
f6
0.000 -0.025 0.0000 -0.0010
0.025T 0.025L 0.0010T 0.0010L
h6
-0.014 -0.039 -0.0006 -0.0016
0.011T 0.039L 0.0004T 0.0016L
g6
-0.014 -0.039 -0.0006 -0.0016
0.011T 0.039 0.0004T 0.0016L
g6
-0.043 -0.068 -0.0016 -0.0026
0.018L 0.068L 0.0006L 0.0026L
f6
0.000 -0.029 0.0000 -0.0011
0.030T 0.029L 0.0012T 0.0011L
h6
-0.015 -0.044 -0.0006 -0.0017
0.015T 0.044L 0.0006T 0.0017L
g6
-0.015 -0.044 -0.0006 -0.0017
0.015T 0.044L 0.0006T 0.0017L
g6
-0.050 -0.079 -0.0020 -0.0031
0.020L 0.079L 0.0008L 0.0031L
f6
0.000 -0.032 0.0000 -0.0012
0.035T 0.032L 0.0014T 0.0012L
h6
-0.017 -0.049 -0.0007 -0.0019
0.018T 0.049L 0.0007T 0.0019L
g6
-0.017 -0.049 -0.0007 -0.0019
0.018T 0.049L 0.0007T 0.0019L
g6
-0.056 -0.068 -0.0022 -0.0027
0.021L 0.088L 0.0008L 0.0035L
f6
Symbol
Symbol
Symbol
Symbol
Continued on next page.
TIMKEN TAPERED ROLLER BEARING CATALOG
39
ENGINEERING fitting practice TABLES These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
inner ring – Industrial Equipment Classes K and N (Metric)
Table 22. Tapered Roller Bearings – Inner ring Table 22 continued. Industrial Equipment Classes K and N (Metric) Inner Ring Bore Range
Deviation from nominal (maximum) bearing bore and resultant fit. T= Tight L = Loose
40
Tolerance
Over
Incl.
mm in.
mm in.
315.000 12.4016
355.000 13.9764
355.000 13.9764
400.000 15.7480
400.000 15.7580
450.000 17.7165
mm in.
-0.040 0.000 -0.0016 0.0000
Rotating Inner Ring
Rotating or Stationary Inner Ring
Ground Seat
Unground Seat or Ground Seat
Constant Loads With Moderate Shock
Heavy Loads, High Speed or Shock
Inner Ring Seat Deviation
Resultant Fit
mm in.
mm in.
+0.073 +0.037 +0.0029 +0.0015
0.113T 0.037T 0.0044T 0.0015T
n6
Inner Ring Seat Deviation
Resultant Fit
mm in.
mm in.
+0.165 +0.108 +0.0065 +0.0043
0.205T 0.108T 0.0081T 0.0043T
+0.171 +0.114 +0.0067 +0.0045
0.211T 0.114T 0.0083T 0.0045T
+0.189 +0.126 +0.0074 +0.0092
0.234T 0.126T 0.0092T 0.0050T
+0.195 +0.132 +0.0077 +0.0052
0.240T 0.132T 0.0094T 0.0052T
Symbol
r7
-0.045 0.000 -0.0018 0.0000
+0.080 +0.040 +0.0031 +0.0016
0.0125T 0.040T 0.0049T 0.0016T
n6
–
+0.200 +0.125 +0.0079 +0.0049
0.250T 0.125T 0.0098T 0.0049T
–
–
+0.225 +0.150 +0.0089 +0.0059
0.305T 0.105T 0.0102T 0.0041T
–
–
+0.275 +0.175 +0.0108 +0.0069
0.375T 0.175T 0.0148T 0.0069T
–
450.000 17.7165
500.000 19.6850
500.000 29.6850
630.000 24.8032
-0.050 0.000 -0.0020 0.0000
+0.100 +0.050 +0.0039 +0.0020
0.150T 0.050T 0.0059T 0.0020T
630.000 24.8032
800.000 31.4961
-0.080 0.000 -0.0031 0.0000
+0.125 +0.050 +0.0049 +0.0020
0.205T 0.050T 0.0081T 0.0020T
800.000 31.4961
1000.000 39.3701
-0.100 0.000 -0.0039 0.0000
+0.150 +0.050 +0.0059 +0.0020
0.250T 0.050T 0.0098T 0.0020T
TIMKEN TAPERED ROLLER BEARING CATALOG
Symbol
r7
ENGINEERING fitting practice Tables These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Stationary Inner Ring Unground Seat
Ground Seat
Unground Seat
Hardened and Ground Seat
Moderate Loads, No Shock
Moderate Loads, No Shock
Sheaves, Wheels, Idlers
Wheel Spindles
Inner Ring Seat Deviation
Resultant Fit
Inner Ring Seat Deviation
Resultant Fit
mm in.
mm in.
0.000 -0.036 0.0000 -0.0014
0.040T 0.036L 0.0016T 0.0014L
0.000 -0.040 0.0000 -0.0020
Inner Ring Seat Deviation
Resultant Fit
mm in.
mm in.
mm in.
mm in.
h6
-0.018 -0.075 -0.0007 -0.0030
0.022T 0.075L 0.0009T 0.0030L
g7
-0.018 -0.075 -0.0007 -0.0029
0.022T 0.075L 0.0009T 0.0029L
0.045T 0.040L 0.0018T 0.0016L
h6
-0.020 -0.083 -0.0008 -0.0033
0.025T 0.083L 0.0008T 0.0033L
g7
-0.020 -0.083 -0.0008 -0.0033
0.000 -0.050 0.0000 -0.0020
0.050T 0.050L 0.0020T 0.0020L
–
-0.050 -0.100 -0.0020 -0.0039
0.000 0.100L 0.0000 0.0039L
–
0.000 -0.075 0.0000 -0.0030
0.080T 0.075L 0.0031T 0.0030L
–
-0.080 -0.150 -0.0031 -0.0059
0.000 0.150L 0.0000 0.0059L
0.000 -0.100 0.0000 -0.0039
0.100T 0.100L 0.0039T 0.0039L
–
-0.100 -0.200 -0.0039 -0.0079
0.000 0.200L 0.0000 0.0079L
Symbol
Inner Ring Seat Deviation
Resultant Fit
mm in.
mm in.
g7
–
–
–
0.025T 0.083L 0.0008T 0.0033L
g7
–
–
–
-0.050 -0.100 -0.0020 -0.0039
0.000 0.100L 0.0000 0.0039L
–
–
–
–
–
-0.080 -0.150 -0.0031 -0.0059
0.000 0.150L 0.0000 0.0059L
–
–
–
–
–
-0.100 -0.200 -0.0039 -0.0079
0.000 0.200L 0.0000 0.0079L
–
–
–
–
Symbol
Symbol
Symbol
TIMKEN TAPERED ROLLER BEARING CATALOG
41
ENGINEERING fitting practice TABLES These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Outer Ring – Industrial Equipment Classes K and N (Metric)
Deviation from nominal (maximum) bearing O.D. and resultant fit. T= Tight L = Loose
Table 23. Tapered Roller Bearings – Outer Ring – Industrial Equipment Classes K and N (Metric) Outer Ring O.D. Range
Tolerance
Stationary Cup
Rotating Cup
Adjustable
Nonadjustable or in Carriers or Sheaves - Clamped
Floating or Clamped Outer Ring Resultant Seat Fit Deviation
Symbol
Outer Ring Resultant Seat Fit Deviation
Nonadjustable or in Carriers Symbol
Outer Ring Resultant Seat Fit Deviation
Symbol
Outer Ring Resultant Seat Fit Deviation
Symbol
Over
Incl.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
18.000 0.7087
30.000 1.1811
0.000 -0.012 0.0000 -0.0005
+0.007 +0.028 +0.0003 +0.0011
0.007L 0.040L 0.0003L 0.0016L
G7
-0.009 +0.012 -0.0004 +0.0005
0.009T 0.024L 0.0004T 0.0009L
J7
-0.035 -0.014 -0.0014 -0.0005
0.035T 0.002T 0.0014T 0.0001T
P7
-0.041 -0.020 -0.0016 -0.0009
0.041T 0.008T 0.0016T 0.0003T
R7
30.000 1.1811
50.000 1.9685
0.000 -0.014 0.0000 -0.0006
+0.009 +0.034 +0.0004 +0.0013
0.009L 0.048L 0.0004L 0.0019L
G7
-0.011 +0.014 -0.0004 +0.0006
0.011T 0.028L 0.0004T 0.0011L
J7
-0.042 -0.017 -0.0017 -0.0007
0.042T 0.003T 0.0017T 0.0001T
P7
-0.050 -0.025 -0.0020 -0.0010
0.050T 0.011T 0.0020T 0.0004T
R7
50.000 1.9685
65.000 2.5591
-0.060 -0.030 -0.0024 -0.0012
0.060T 0.014T 0.0024T 0.0006T
-0.062 -0.032 -0.0021 -0.0013
0.062T 0.016T 0.0024T 0.0006T
-0.073 -0.038 -0.0029 -0.0015
0.073T 0.020T 0.0029T 0.0008T
-0.076 -0.041 -0.0030 -0.0016
0.076T 0.023T 0.0030T 0.0009T
-0.088 -0.048 -0.0035 -0.0019
0.088T 0.028T 0.0035T 0.0011T
-0.090 -0.050 -0.0035 -0.0020
0.090T 0.030T 0.0035T 0.0012T
-0.090 -0.050 -0.0035 -0.0020
0.090T 0.025T 0.0035T 0.0010T
-0.093 -0.053 -0.0037 -0.0021
0.093T 0.028T 0.0037T 0.0011T
65.000 2.5591
80.000 3.1496
80.000 3.1496
100.000 3.9370
100.000 3.9370
120.000 4.7244
120.000 4.7244
140.000 5.5188
140.000 5.5188
150.000 5.9055
150.000 5.9055
160.000 6.2992
160.000 6.2992
180.000 7.0866
0.000 -0.016 0.0000 -0.0006
0.000 -0.018 0.0000 -0.0007
0.000 -0.020 0.0000 -0.0008
0.000 -0.025 0.0000 -0.0010
+0.010 +0.040 +0.0004 +0.0016
+0.012 +0.047 +0.0005 +0.0019
+0.014 +0.054 +0.0006 +0.0021
+0.014 +0.054 +0.0006 +0.0021
0.010L 0.056L 0.0004L 0.0022L
0.012L 0.065L 0.0005L 0.0026L
0.014L 0.074L 0.0006L 0.0029L
0.014L 0.079L 0.0006L 0.0031L
G7
G7
G7
G7
-0.012 +0.018 -0.0005 +0.0007
-0.013 +0.022 -0.0005 +0.0009
+0.014 +0.026 +0.0006 +0.0010
+0.014 +0.026 +0.0006 +0.0010
0.012T 0.034L 0.0005T 0.0013L
0.013T 0.040L 0.0005T 0.0016L
0.014L 0.046L 0.0006L 0.0018L
0.014L 0.051L 0.0006L 0.0020L
J7
J7
J7
J7
-0.051 -0.021 -0.0020 -0.0008
-0.059 -0.024 -0.0023 -0.0009
-0.068 -0.028 -0.0027 -0.0011
-0.068 -0.028 -0.0027 -0.0011
0.051T 0.005T 0.0020T 0.0002T
0.059T 0.006T 0.0023T 0.0002T
0.068T 0.074T 0.0027T 0.0003T
0.068T 0.003T 0.0027T 0.0001T
P7
P7
P7
P7
R7
R7
R7
R7
Continued on next page.
42
TIMKEN TAPERED ROLLER BEARING CATALOG
ENGINEERING fitting practice Tables These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Table 23 continued.
Outer Ring O.D. Range
Tolerance
Over
Incl.
mm in.
mm in.
180.000 7.0866
200.000 7.8740
200.000 7.8740
225.000 8.8583
225.000 8.8583
250.000 9.8425
Rotating Cup
Adjustable
Nonadjustable or in Carriers or Sheaves - Clamped
Floating or Clamped Outer Ring Resultant Seat Fit Deviation
Symbol
250.000 9.8425
-0.113 -0.067 -0.0044 -0.0026
0.113T 0.037T 0.0044T 0.0015T
280.000 11.0236
-0.126 -0.074 -0.0050 -0.0029
0.126T 0.039T 0.0050T 0.0015T
-0.130 -0.078 -0.0051 -0.0031
0.130T 0.043T 0.0051T 0.0017T
-0.144 -0.087 -0.0057 -0.0034
0.144T 0.047T 0.0057T 0.0019T
-0.150 -0.093 -0.0059 -0.0037
0.150T 0.053T 0.0059T 0.0021T
-0.166 -0.103 -0.0065 -0.0041
0.166T 0.058T 0.0065T 0.0023T
-0.172 -0.109 -0.0068 -0.0043
0.172T 0.064T 0.0068T 0.0025T 0.190T 0.070T 0.0075T 0.0028T
R7
315.000 12.4016
315.000 12.4016
355.000 13.9764
355.000 13.9764
400.000 15.7480
400.000 15.7480
450.000 17.7165
0.000 -0.035 0.0000 -0.0014
0.000 -0.040 0.0000 -0.0016
+0.017 +0.069 +0.0007 +0.0027
+0.062 +0.098 +0.0024 +0.0039
0.017L 0.104L 0.0007L 0.0041L
0.062L 0.138L 0.0024L 0.0054L
0.000 -0.045 0.0000 -0.0018
+0.068 +0.095 +0.0027 +0.0037
0.068L 0.140L 0.0027L 0.0055L
450.000 17.7165
500.000 19.6850
500.000 19.6850
630.000 24.8032
0.000 -0.050 0.0000 -0.0020
+0.065 +0.115 +0.0026 +0.0045
0.065L 0.165L 0.0026L 0.0065L
630.000 24.8032
800.000 31.4961
0.000 -0.080 0.0000 -0.0031
+0.075 +0.150 +0.0030 +0.0059
0.075L 0.225L 0.0030L 0.0089L
800.000 31.4961
1000.000 39.3701
0.000 -0.100 0.0000 -0.0039
+0.075 +0.175 +0.0030 +0.0069
0.075L 0.275L 0.0030L 0.0108L
G7
G7
F6
-0.016 +0.036 -0.0006 +0.0013
-0.018 +0.039 -0.0007 +0.0015
0.016T 0.071L 0.0006T 0.0028L
0.018T 0.079L 0.0007T 0.0031L
F5
-0.020 +0.043 -0.0008 +0.0017
0.020T 0.088L 0.0008T 0.0035L
–
-0.022 +0.046 -0.0009 +0.0018
0.022T 0.096L 0.0009T 0.0038L
–
-0.025 +0.050 -0.0098 +0.0020
0.025T 0.130L 0.0098T 0.0051L
–
-0.025 +0.075 -0.0098 +0.0030
0.025T 0.175L 0.0098T 0.0069L
J7
J7
J7
-0.079 -0.033 -0.0031 -0.0014
-0.088 -0.036 -0.0035 -0.0014
-0.098 -0.041 -0.0039 -0.0016
mm in.
Outer Ring Resultant Seat Fit Deviation
0.109T 0.033T 0.0043T 0.0013T
0.016T 0.060L 0.0006T 0.0024L
mm in.
Symbol
-0.109 -0.063 -0.0043 -0.0025
-0.016 +0.030 -0.00076 +0.0012
mm in.
Outer Ring Resultant Seat Fit Deviation
0.106T 0.030T 0.0042T 0.0012T
0.015L 0.091L 0.0006L 0.0036L
mm in.
Symbol
-0.106 -0.060 -0.0042 -0.0024 +0.015 +0.061 +0.0006 +0.0024
mm in.
Outer Ring Resultant Seat Fit Deviation
mm in.
0.000 -0.030 0.0000 -0.0012
mm in.
Symbol
Nonadjustable or in Carriers
mm in.
280.000 11.0236
mm in.
Stationary Cup
0.079T 0.003T 0.0031T 0.0001T
0.088T 0.001T 0.0035T 0.0000
0.098T 0.001T 0.0039T 0.0001T
P7
P7
P7
R7
R7
R7
J7
-0.108 -0.045 -0.0043 -0.0018
0.108T 0.000 0.0043T 0.0000
–
-0.118 -0.050 -0.0046 -0.0020
0.118T 0.000 0.0046T 0.0000
–
-0.190 -0.120 -0.0075 -0.0047
–
-0.150 -0.075 -0.0059 -0.0030
0.150T 0.000 0.0059T 0.0000
–
–
–
R7
–
-0.200 -0.100 -0.0079 -0.0039
0.200T 0.000 0.0079T 0.0000
–
–
–
R7
P7
R7
TIMKEN TAPERED ROLLER BEARING CATALOG
43
ENGINEERING fitting practice TABLES These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
inner ring – Industrial Equipment Classes 4 and 2 (Inch)
Deviation from nominal (minimum) bearing bore and resultant fit. T= Tight L = Loose
Table 24. Tapered Roller Bearings – Inner Ring – Industrial Equipment Classes 4 and 2 (Inch) Inner Ring Bore
Range
Rotating Inner Ring
Rotating or Stationary Inner Ring
Ground Seat
Unground or Ground Seat
Heavy Loads, or Tolerance(1) Constant Loads With Moderate Shock High Speed Or Shock
Stationary Inner Ring Unground Seat
Ground Seat
Unground Seat
Hardened and Ground Seat
Moderate Loads, No Shock
Moderate Loads, No Shock
Sheaves, Wheels, Idlers
Wheel Spindles
Inner Ring Inner Ring Inner Ring Inner Ring Inner Ring Inner Ring Resultant Resultant Resultant Resultant Resultant Resultant Seat Seat Seat Seat Seat Seat Fit Fit Fit Fit Fit Fit Deviation Deviation Deviation Deviation Deviation Deviation
Over
Incl.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
76.200 3.0000
0.000 +0.013 0.0000 +0.0005
+0.038(2) +0.026 +0.0015 +0.0010
0.038T 0.012T 0.0015T 0.0005T
+0.064 +0.038 +0.0025 +0.0015
0.064T 0.025T 0.0025T 0.0010T
+0.013 0.000 +0.0005T 0.0000
0.013T 0.013L 0.0005T 0.0005L
0.000 -0.013 0.0000 -0.0005
0.000 0.026L 0.0000 0.0010L
0.000 -0.013 0.0000 -0.0005
0.000 0.026L 0.0000 0.0010L
-0.005 -0.018 -0.0002 -0.0007
0.005L 0.031L 0.0002L 0.0012L
76.200 3.0000
304.800 12.0000
0.000 +0.025 0.0000 +0.0010
+0.064 +0.038 +0.0025 +0.0015
0.064T 0.013T 0.0025T 0.0005T
+0.025 0.000 +0.0010 0.0000
0.025T 0.025L 0.0010T 0.0010L
0.000 -0.025 0.0000 -0.0010
0.000 0.051L 0.0000 0.0020L
0.000 -0.025 0.0000 -0.0010
0.000 0.051L 0.0000 0.0020L
-0.005 -0.031 -0.0002 -0.0012
0.005L 0.056L 0.0002L 0.0022L
304.800 609.600 12.0000 24.0000
0.000 +0.051 0.0000 +0.0020
+0.127 +0.076 +0.0050 +0.0030
0.127T 0.025T 0.0050T 0.0010T
+0.051 0.000 +0.0020 0.0000
0.051T 0.051L 0.0020T 0.0020L
0.000 -0.051 0.0000 -0.0020
0.000 0.102L 0.0000 0.0040L
0.000 -0.051 0.0000 -0.0020
0.000 0.102L 0.0000 0.0040L
–
–
609.600 914.400 24.0000 36.0000
0.000 +0.076 0.0000 +0.0030
+0.191 +0.114 +0.0075 +0.0015T
+0.076 0.000 +0.0030 0.0000
0.076T 0.076L 0.0030T 0.0030L
0.000 -0.076 0.0000 -0.0030
0.000 0.152L 0.0000 0.0060L
0.000 -0.076 0.0000 -0.0030
0.000 0.152L 0.0000 0.0060L
–
–
Use Average Tight Inner Ring Fit of 0.0005 mm/mm (0.0005in./in.) of Inner Ring Bore(3)
(1)Does not apply to TNASW and TNASWE type bearings.
(2)Example: If the minimum inner ring bore is 76.200 mm (3.0000 in.) the suggested shaft size = 76.238 mm (3.0015 in.) to 76.225 mm (3.0010 in.) for an inner ring fit of 0.038 mm (0.0015 in.) tight to 0.012 mm (0.0005 in.) tight. (3)For inner ring bores between 76.200 mm (3.0000 in.) and 101.600 mm (4.0000 in.) use a minimum fit of 0.025 mm (0.0001 in.) tight.
44
TIMKEN TAPERED ROLLER BEARING CATALOG
ENGINEERING fitting practice Tables These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Outer Ring – Industrial Equipment Classes 4 and 2 (Inch)
Deviation from nominal (minimum) bearing O.D. and resultant fit. T= Tight L = Loose
Table 25. Tapered Roller Bearings – Outer Ring – Industrial Equipment Classes 4 and 2 (Inch) Outer Ring O.D. Range
Stationary Outer Ring Tolerance
Floating or Clamped
Adjustable
Stationary Or Rotating Outer Ring
Rotating Outer Ring
Non-adjustable or In Carriers, Sheaves - Clamped
Sheaves - Unclamped(1)
Outer Ring Seat Deviation
Resultant Fit
Outer Ring Seat Deviation
Resultant Fit
Outer Ring Seat Deviation
Resultant Fit
Outer Ring Seat Deviation
Resultant Fit
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
76.200 3.0000
+0.025 0.000 +0.0010 0.0000
+0.050 +0.076 +0.0020 +0.0030
0.026L 0.076L 0.0010L 0.0030L
0.000 +0.025 0.0000 +0.0010
0.025T 0.025L 0.0010T 0.0010L
-0.039 -0.013 -0.0015 -0.0005
0.064T 0.013T 0.0025T 0.0005T
-0.077 -0.051 -0.0030 -0.0020
0.102T 0.051T 0.0040T 0.0020T
76.200 3.0000
127.000 5.0000
+0.025 0.000 +0.0010 0.0000
+0.050 +0.076 +0.0020 +0.0030
0.026L 0.076L 0.0010L 0.0030L
0.000 +0.025 0.0000 +0.0010
0.025T 0.025L 0.0010T 0.0010L
-0.051 -0.025 -0.0020 -0.0010
0.076T 0.025T 0.0030T 0.0010T
-0.077 -0.051 -0.0030 -0.0020
0.102T 0.051T 0.0040T 0.0020T
127.000 5.0000
304.800 12.0000
+0.025 0.000 +0.0010 0.0000
+0.050 +0.076 +0.0020 +0.0030
0.026L 0.076L 0.0010L 0.0030L
0.000 +0.051 0.0000 +0.0020
0.025T 0.051L 0.0010T 0.0020L
-0.051 -0.025 -0.0020 -0.0010
0.076T 0.025T 0.0030T 0.0010T
-0.077 -0.051 -0.0030 -0.0020
0.102T 0.051T 0.0040T 0.0020T
304.800 12.0000
609.600 24.0000
+0.051 0.000 +0.0020 0.0000
+0.102 +0.152 +0.0040 +0.0060
0.051L 0.152L 0.0020L 0.0060L
+0.026 +0.076 +0.0010 +0.0030
0.025T 0.076L 0.0010T 0.0030L
-0.076 -0.025 -0.0030 -0.0010
0.127T 0.025T 0.0050T 0.0010T
-0.102 -0.051 -0.0040 -0.0020
0.153T 0.051T 0.0060T 0.0020T
609.600 24.0000
914.400 36.0000
+0.076 0.000 +0.0030 0.0000
+0.152 +0.229 +0.0060 +0.0090
0.076L 0.229L 0.0030L 0.0090L
+0.051 +0.127 +0.0020 +0.0050
0.025T 0.0127L 0.0010T 0.0050L
-0.102 -0.025 -0.0040 -0.0010
0.178T 0.025T 0.0070T 0.0010T
–
–
Over
Incl.
mm in.
mm in.
0.000 0.0000
(1)Unclamped outer ring design is applicable only to sheaves with negligible fleet angle.
TIMKEN TAPERED ROLLER BEARING CATALOG
45
ENGINEERING fitting practice TABLES These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Inner Ring – Automotive Equipment Class 4 and 2 (Inch) Deviation from nominal (minimum) bearing bore and resultant fit. T= Tight L = Loose
Table 26. Tapered Roller Bearings – Inner Ring Automotive Equipment Classes 4 and 2 (Inch) Shaft O.D. Stationary Inner Ring Front Wheels Rear Wheel (Full-Floating Axles) Trailer Wheels
Inner Ring Bore Tolerance
Rotating Inner Ring Rear Wheels (Semi-Floating Axles)
Rear Wheels (Unit-Bearing) (Semi-Floating Axles)
Non-adjustable Shaft O.D. Deviation
Resultant Fit
Shaft O.D. Deviation
Resultant Fit
Shaft O.D. Deviation
Resultant Fit
Over
Incl.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
76.200 3.0000
0.000 +0.0013 0.0000 +0.0005
-0.005 -0.018 -0.0002 -0.0070
0.005L 0.031L 0.0002L 0.0012L
+0.051 +0.038 +0.0020 +0.0015
0.051T 0.025T 0.0020T 0.0010T
+0.056 +0.038 +0.0022 +0.0015
0.056T 0.025T 0.0022T 0.0010T
76.200 3.0000
304.800 12.0000
0.000 +0.0025 0.0000 +0.0010
-0.0013 -0.038 -0.0050 -0.0015
0.013L 0.063L 0.0005L 0.0025L
+0.076 +0.051 +0.0030 +0.0020
0.076T 0.026T 0.0030T 0.0010T
–
–
Table 27. Tapered Roller Bearings – Outer Ring Automotive Equipment Classes 4 and 2 (Inch)
Outer Ring – Automotive Equipment Classes 4 and 2 (Inch)
Housing Bore Rotating Outer Ring Front Wheels
Outer Ring O.D. Tolerance
Rear Wheels (Full-Floating Trailer Wheels)
Non-adjustable
46
TIMKEN TAPERED ROLLER BEARING CATALOG
Housing Bore Deviation
Resultant Fit
mm in.
mm in.
mm in.
76.200 3.0000
+0.025 0.000 +0.0010 0.0000
-0.051 -0.013 -0.0020 -0.0005
0.076T 0.013T 0.0030T 0.0005T
76.200 3.0000
127.000 5.0000
+0.025 0.000 +0.0010 0.0000
-0.077 -0.025 -0.0030 -0.0010
0.102T 0.025T 0.0040T 0.0010T
127.000 5.0000
304.800 12.0000
+0.025 0.000 +0.0010 0.0000
-0.077 -0.025 -0.0030 -0.0010
0.102T 0.025T 0.0040T 0.0010T
Over
Incl.
mm in.
mm in.
0.000 0.0000
ENGINEERING fitting practice Tables These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Shaft O.D. Rotating Inner Ring Pinion Clamped
Transaxles Transmissions Transfer Cases Cross Shafts
Differential
Collapsible Spacer
Non-adjustable
Non-adjustable
Non-adjustable
Shaft O.D. Deviation
Resultant Fit
Shaft O.D. Deviation
Resultant Fit
Shaft O.D. Deviation
Resultant Fit
Shaft O.D. Deviation
Resultant Fit
Shaft O.D. Deviation
Resultant Fit
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
+0.025 +0.013 +0.0010 +0.0005
0.025T 0.000 0.0010T 0.0000
+0.030 +0.018 +0.0012 +0.0007
0.030T 0.005T 0.0012T 0.0002T
+0.051 +0.038 +0.0020 +0.0015
0.051T 0.025T 0.0020T 0.0010T
+0.102 +0.064 +0.0040 +0.0025
0.102T 0.051T 0.0040T 0.0020T
+0.038 +0.025 +0.0015 +0.0010
0.038T 0.012T 0.0015T 0.0005T
+0.038 +0.013 +0.0015 +0.0005
0.038T 0.012T 0.0015T 0.0005T
–
–
+0.076 +0.051 +0.0030 +0.0020
0.076T 0.026T 0.0030T 0.0010T
+0.102 +0.076 +0.0040 +0.0025
0.102T 0.051T 0.0040T 0.0020T
+0.064 +0.038 +0.0025 +0.0015
0.064T 0.013T 0.0025T 0.0005T
Housing Bore Stationary Outer Ring Rear Wheels
(Semi-Floating Axles)
Differential
Adjustable (TS) Clamped (TSU)
(Split Seat)
Transmissions
Adjustable
Transfer Cases Cross Shafts
Pinion (Solid Seat) Transmission
Adjustable
Differential Transaxles Transfer Cases
Non-adjustable
Housing Bore Deviation
Resultant Fit
Housing Bore Deviation
Resultant Fit
Housing Bore Deviation
Resultant Fit
Housing Bore Deviation
Resultant Fit
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
+0.038 +0.076 +0.0015 +0.0030
0.013L 0.076L 0.0005L 0.0030L
+0.025 +0.051 +0.0010 +0.0020
0.000 0.051L 0.0000 0.0020L
0.000 +0.025 0.000 +0.0010
0.025T 0.025L 0.0010T 0.0010L
-0.038 -0.013 -0.0015 -0.0005
0.063T 0.013T 0.0025T 0.0005T
+0.038 +0.076 +0.0015 +0.0030
0.013L 0.076L 0.0005L 0.0030L
+0.025 +0.051 +0.0010 +0.0020
0.000 0.051L 0.0000 0.0020L
0.000 +0.025 0.0000 +0.0010
0.025T 0.025L 0.0010T 0.0010L
-0.051 -0.025 -0.0020 -0.0010
0.076T 0.025T 0.0030T 0.0010T
–
0.000 +0.051 0.0000 +0.0020
0.025T 0.051L 0.0010T 0.0020L
0.000 +0.051 0.0000 +0.0020
0.025T 0.051L 0.0010T 0.0020L
-0.077 -0.025 -0.0030 -0.0010
0.102T 0.025T 0.0040T 0.0010T
–
TIMKEN TAPERED ROLLER BEARING CATALOG
47
ENGINEERING fitting practice TABLES These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Inner Ring – Automotive Equipment Classes K and N (Metric) Table 28. Tapered Roller Bearings – Inner Ring – Automotive Equipment Classes K and N (Metric) Shaft O.D. Stationary Inner Ring
Rotating Inner Ring
Front Wheels Rear Wheel (Full-Floating Axles) Trailer Wheels
Inner Ring Bore Tolerance
Non-adjustable
48
Shaft O.D. Resultant Deviation Fit
Over
Incl.
mm in.
mm in.
mm in.
mm in.
mm in.
18.000 0.7087
30.000 1.1811
-0.012 0.000 -0.0005 0.0000
-0.020 -0.033 -0.0008 -0.0013
0.008L 0.033L 0.0003L 0.0013L
30.000 1.1811
50.000 1.9685
-0.012 0.000 -0.0005 0.0000
-0.025 -0.041 -0.0010 -0.0016
50.000 1.9685
80.000 3.1496
-0.015 0.000 -0.0006 0.0000
80.000 3.1496
120.000 4.7244
120.000 4.7244
180.000 7.0866
Non-adjustable Symbol
Shaft O.D. Resultant Deviation Fit mm in.
mm in.
f6
+0.035 +0.022 +0.0013 +0.0008
0.047T 0.022T 0.0018T 0.0008T
0.013L 0.041L 0.0005L 0.0016L
f6
+0.042 +0.026 +0.0016 +0.0010
-0.030 -0.049 -0.0012 -0.0019
0.015L 0.049L 0.0006L 0.0019L
f6
-0.020 0.000 -0.0008 0.0000
-0.035 -0.058 -0.0014 -0.0023
0.016L 0.058L 0.0006L 0.0023L
-0.025 0.000 -0.0010 0.0000
-0.043 -0.068 -0.0016 -0.0026
0.018L 0.068L 0.0006L 0.0026L
TIMKEN TAPERED ROLLER BEARING CATALOG
Rear Wheels (Unit-Bearing) (Semi-Floating Axles)
Rear Wheels (Semi-Floating Axles)
Non-adjustable Symbol
Shaft O.D. Resultant Deviation Fit
Symbol
mm in.
mm in.
p6
+0.035 +0.022 +0.0013 +0.0008
0.047T 0.022T 0.0018T 0.0008T
p6
0.054T 0.026T 0.0021T 0.0010T
p6
+0.042 +0.026 +0.0016 +0.0010
0.054T 0.026T 0.0021T 0.0010T
p6
+0.051 +0.032 +0.0021 +0.0014
0.066T 0.032T 0.0027T 0.0014T
p6
–
–
–
f6
+0.045 +0.023 +0.0019 +0.0010
0.065T 0.023T 0.0027T 0.0010T
n6
–
–
–
f6
+0.052 +0.027 +0.0022 +0.0012
0.077T 0.029T 0.0032T 0.0012T
n6
–
–
–
ENGINEERING fitting practice Tables These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Shaft O.D. Rotating Inner Ring Pinion Clamped Shaft O.D. Resultant Deviation Fit mm in.
mm in.
+0.015 +0.002 +0.0006 +0.0001
0.027T 0.002T 0.0011T 0.0001T
+0.018 +0.002 +0.0007 +0.0001
Collapsible Spacer Symbol
Shaft O.D. Resultant Deviation Fit mm in.
mm in.
k6
+0.015 +0.002 +0.0006 +0.0001
0.027T 0.002T 0.0011T 0.0001T
0.030T 0.002T 0.0012T 0.0001T
k6
+0.018 +0.002 +0.0007 +0.0001
+0.021 +0.002 +0.0008 -0.0001
0.036T 0.002T 0.0014T 0.0001L
k6
+0.013 -0.009 +0.0005 -0.0004
0.033T 0.009L 0.0013T 0.0004L
j6
+0.014 -0.011 +0.0006 -0.0004
0.039T 0.011L 0.0016T 0.0004L
j6
Non-adjustable
Symbol
Shaft O.D. Resultant Deviation Fit mm in.
mm in.
k6
+0.035 +0.022 +0.0013 +0.0009
0.047T 0.022T 0.0018T 0.0009T
0.030T 0.002T 0.0012T 0.0001T
k6
+0.042 +0.026 +0.0016 +0.0010
+0.021 +0.002 +0.0008 +0.0001
0.036T 0.002T 0.0014T 0.0001L
k6
–
–
–
–
Symbol
Differential
Transaxles, Transmissions Transfer Cases, Cross Shafts
Non-adjustable
Non-adjustable
Shaft O.D. Resultant Shaft O.D. Resultant Deviation Fit Deviation Fit
Symbol
mm in.
mm in.
mm in.
mm in.
p6
+0.056 +0.035 +0.0022 +0.0014
0.068T 0.035T 0.0027T 0.0014T
+0.021 +0.008 +0.0008 +0.0003
0.033T 0.008T 0.0013T 0.0003T
m6
0.054T 0.026T 0.0021T 0.0010T
p6
+0.068 +0.043 +0.0028 +0.0018
0.080T 0.043T 0.0033T 0.0018T
+0.025 +0.009 +0.0010 +0.0004
0.037T 0.009T 0.0015T 0.0004T
m6
+0.051 +0.032 +0.021 +0.014
0.066T 0.032T 0.0027T 0.0014T
p6
+0.0089 +0.059 +0.0034 +0.0022
0.104T 0.059T 0.0040T 0.0022T
+0.030 +0.011 +0.0012 +0.0004
0.045T 0.011T 0.0018T 0.0004T
m6
–
+0.045 +0.023 +0.0019 +0.0010
0.065T 0.023T 0.0027T 0.0010T
n6
+0.114 +0.079 +0.0044 +0.0030
0.134T 0.079T 0.0052T 0.0030T
+0.035 +0.013 +0.0014 +0.0005
0.055T 0.013T 0.0022T 0.0005T
m6
–
+0.052 +0.028 +0.0022 +0.0012
0.077T 0.029T 0.0032T 0.0012T
n6
+0.140 +0.100 +0.0056 +0.0040
0.165T 0.100T 0.0066T 0.0040T
+0.040 +0.015 +0.0016 +0.0006
0.066T 0.015T 0.0026T 0.0006T
–
TIMKEN TAPERED ROLLER BEARING CATALOG
49
ENGINEERING fitting practice TABLES These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Deviation from nominal (maximum) bearing bore and resultant fit.
Outer Ring – Automotive Equipment Classes K and N (Metric)
T= Tight L = Loose
TABLE 29. Tapered roller bearingS – Outer Ring – Automotive Equipment Classes K and N (Metric) Housing Bore Rotating Outer Ring Outer Ring O.D. Tolerance
Over
Incl.
mm in.
mm in.
Rear Wheels (Semi-Floating Axles)
Differential (Split Seat)
Transmissions Transfer Cases Cross Shafts
Pinion Differential (Solid Seat) Transaxles Transmission(1) Transfer Cases
Non-adjustable
Adjustable (TS) Clamped (TSU)
Adjustable
Adjustable
Non-adjustable
Housing Housing Housing Housing Housing Resultant Resultant Resultant Resultant Resultant Bore Symbol Bore Symbol Bore Symbol Bore Symbol Bore Symbol Fit Fit Fit Fit Fit Deviation Deviation Deviation Deviation Deviation mm in.
mm in.
mm in.
30.000 50.000 1.1811 1.9685
0.000 -0.014 0.0000 -0.0006
-0.050 -0.025 -0.0020 -0.0010
0.050T 0.011T 0.0020T 0.0004T
50.000 65.000 1.9685 2.5591
0.000 -0.016 0.0000 -0.0006
-0.060 -0.030 -0.0023 -0.0011
0.060T 0.014T 0.0023T 0.0005T
65.000 80.000 2.5591 3.1496
0.000 -0.016 0.0000 -0.0006
-0.062 -0.032 -0.0023 -0.0011
0.062T 0.016T 0.0023T 0.0005T
80.000 100.000 3.1496 3.9370
0.000 -0.018 0.0000 -0.0007
-0.073 -0.038 -0.0029 -0.0015
0.073T 0.020T 0.0029T 0.0008T
100.000 120.000 3.9370 4.7244
0.000 -0.018 0.0000 -0.0007
-0.076 -0.041 -0.0029 -0.0015
0.076T 0.023T 0.0029T 0.0008T
120.000 140.000 4.7244 5.5118
0.000 -0.020 0.0000 -0.0008
-0.088 -0.048 -0.0035 -0.0019
0.088T 0.028T 0.0035T 0.0011T
140.000 150.000 5.5118 5.9055
0.000 -0.020 0.0000 -0.0008
-0.090 -0.050 -0.0035 -0.0019
0.090T 0.030T 0.0035T 0.0011T
150.000 160.000 5.9055 6.2992
0.000 -0.025 0.0000 -0.0010
-0.090 -0.050 -0.0035 -0.0019
0.090T 0.025T 0.0035T 0.0009T
0.000 -0.025 0.0000 -0.0010
-0.093 -0.053 -0.0035 -0.0019
0.093T 0.028T 0.0035T 0.0009T
160.000 180.000 6.2992 7.0866
Stationary Outer Ring
Front Wheels Rear Wheels (Full-Floating Trailer Wheels)
mm in. R7
R7
R7
R7
R7
mm in.
+0.009 0.009L +0.034 0.048L +0.0004 0.0004L +0.0014 0.0020L
+0.010 0.010L +0.040 0.056L +0.0004 0.0004L +0.0016 0.0022L
+0.012 0.012L +0.047 0.065L +0.0005 0.0005L +0.0029 0.0026L
+0.014 0.014L +0.054 0.074L +0.0006 0.0006L +0.0022 0.0030L
+0.014 0.014L +0.054 0.079L +0.0006 0.0006L +0.0022 0.0032L
mm in. G7
G7
G7
G7
G7
mm in.
0.000 0.000 +0.025 0.039L 0.0000 0.0000 +0.0010 0.0016L
0.000 0.000 +0.030 0.046L 0.0000 0.0000 +0.0012 0.0018L
0.000 0.000 +0.035 0.053L 0.0000 0.0000 +0.0014 0.0021L
-0.014 0.014T +0.026 0.046L -0.0006 0.0006L +0.0010 0.0018L
-0.014 0.014T +0.026 0.051L -0.0006 0.0006T +0.0010 0.0020L
mm in. H7
H7
H7
J7
J7
-0.013 0.013T +0.003 0.017L -0.0005 0.0005T +0.0001 0.0007L
-0.015 0.015T +0.004 0.020L -0.0006 0.0006T +0.0001 0.0007L
-0.018 0.018T +0.004 0.022L -0.0007 0.0007T +0.0002 0.0009L
-0.021 0.021T +0.004 0.024L -0.0008 0.0008T +0.0002 0.0010L
-0.021 0.021T +0.004 0.029L -0.0008 0.0008T +0.0002 0.0012L
(1)Aluminum housings min. fit of 0.025 mm (0.001 in.) per inch of outer ring O.D. Magnesium housing min. fit of 0.038 mm (0.0015 in.)
per inch of outer ring O.D.
50
TIMKEN TAPERED ROLLER BEARING CATALOG
mm in.
mm in. K6
K6
K6
K6
K6
mm in.
-0.050 0.050T -0.025 0.011T -0.0020 0.0020T -0.0010 0.0004T -0.060 0.060 -0.030 0.014T -0.0023 0.0023T -0.0011 0.0005T -0.062 0.062T -0.032 0.016T -0.0023 0.0023T -0.0011 0.0005T -0.073 0.073T -0.038 0.020T -0.0029 0.0029T -0.0015 0.0008T -0.076 0.076T -0.041 0.023T -0.0029 0.0029T -0.0015 0.0008T -0.088 0.088T -0.048 0.028T -0.0035 0.0035T -0.0019 0.0011T -0.090 0.090T -0.050 0.030T -0.0035 0.0035T -0.0019 0.0011T -0.090 0.090T -0.050 0.025T -0.0035 0.0035T -0.0019 0.0009T -0.093 0.093T -0.053 0.028T -0.0035 0.0035T -0.0019 0.0009T
R7
R7
R7
R7
R7
Continued on next page.
ENGINEERING fitting practice Tables These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
Table 29 continued.
TABLE 29. Tapered roller bearingS – Outer Ring – Automotive Equipment Classes K and N (Metric) Housing Bore Rotating Outer Ring
Outer Ring O.D. Tolerance
Over
Incl.
mm in.
mm in.
Stationary Outer Ring
Front Wheels Rear Wheels (Full-Floating Trailer Wheels)
Rear Wheels (Semi-Floating Axles)
Differential (Split Seat)
Transmissions Transfer Cases Cross Shafts
Pinion Differential (Solid Seat) Transaxles Transmission(1) Transfer Cases
Non-adjustable
Adjustable (TS) Clamped (TSU)
Adjustable
Adjustable
Non-adjustable
Housing Housing Housing Housing Housing Resultant Resultant Resultant Resultant Resultant Bore Symbol Bore Symbol Bore Symbol Bore Symbol Bore Symbol Fit Fit Fit Fit Fit Deviation Deviation Deviation Deviation Deviation mm in.
mm in.
mm in.
180.000 200.000 7.0866 7.8740
0.000 -0.030 0.0000 -0.0012
-0.106 -0.060 -0.0042 -0.0024
0.106T 0.030T 0.0042T 0.0012T
200.000 225.000 7.8740 8.8583
0.000 -0.030 0.0000 -0.0012
-0.109 -0.063 -0.0042 -0.0024
0.109T 0.033T 0.0042T 0.0012T
225.000 250.000 8.8583 9.8425
0.000 -0.030 0.0000 -0.0012
-0.113 -0.067 -0.0042 -0.0024
0.113T 0.037T 0.0042T 0.0012T
-0.113 0.113T -0.067 0.037T -0.0042 0.0042T -0.0024 0.0012T
250.000 280.000 9.8425 11.0236
0.000 -0.035 0.0000 -0.0014
-0.126 -0.074 -0.0047 -0.0027
0.126T 0.039T 0.0047T 0.0013T
-0.126 0.126T -0.074 0.039T -0.0047 0.0047T -0.0027 0.0013T
280.000 315.000 11.0236 12.4016
0.000 -0.035 0.0000 -0.0014
-0.130 -0.078 -0.0047 -0.0027
0.130T 0.043T 0.0047T 0.0013T
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
-0.106 0.106T -0.060 0.030T -0.0042 0.0042T -0.0024 0.0012T R7
R7
–
–
–
–
–
–
-0.016 0.016T +0.030 0.060L -0.0007 0.0007T +0.0011 0.0023L
-0.016 0.016T +0.036 0.071L -0.0007 0.0007T +0.0013 0.0027L
J7
J7
-0.016 0.016T +0.030 0.060L -0.0007 0.0007T +0.0011 0.0023L
-0.016 0.016T +0.036 0.071L -0.0007 0.0007T +0.0014 0.0027L
J7
J7
-0.109 0.109T -0.063 0.033T -0.0042 0.0042T -0.0024 0.0012T
-0.130 0.130T -0.078 0.043T -0.0047 0.0047T -0.0027 0.0013T
R7
R7
(1)Aluminum housings min. fit of 0.025 mm (0.001 in.) per inch of outer ring O.D. Magnesium housing min. fit of 0.038 mm (0.0015 in.) per inch of outer ring O.D.
TIMKEN TAPERED ROLLER BEARING CATALOG
51
ENGINEERING FITTING PRACTICE TABLES These charts are guidelines for specifying shaft and housing fits related to particular operating conditions. Please contact your Timken engineer for more information.
thrust tapered roller bearings Tolerances for housing bore and shaft diameters are shown as variance from nominal bearing dimension. When one ring is piloted by the housing, sufficient clearances must be allowed at the outside diameter of the other ring as well as at the bore of both rings to prevent cross-loading of the rollers. For most applications, this clearance is approximately 1⁄16 in. (1.588 mm, 0.0625 in.).
TTVS
TABLE 30. THRUST tapered Roller Bearings Type TTVS and TTHDFL – Shaft Diameters Bearing Bore Nominal (Min.)
TTHDFL
TABLE 31. THRUST tapered Roller Bearings Type TTVs and TTHDFL – housing Diameters Bearing Bore Nominal (Min.)
Shaft Diameter
Housing Bore
Over
Incl.
Min.(1)
Over
Incl.
Max.
Min.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000 0.0000
304.800 12.0000
-0.051 -0.0020
161.925 6.3750
265.113 10.4375
+0.060 +0.0025
+0.025 +0.0010
304.800 12.0000
508.000 20.0000
-0.051 -0.0020
265.113 10.3475
317.500 12.5000
+0.076 +0.0030
+0.025 +0.0010
508.000 20.0000
711.200 28.0000
-0.076 -0.0030
317.500 12.5000
482.600 19.0000
+0.102 +0.0040
+0.051 +0.0020
711.200 28.0000
1219.200 48.0000
-0.102 -0.0040
482.600 19.0000
603.250 23.7500
+0.113 +0.0045
+0.051 +0.0020
1219.200 48.0000
1727.200 68.0000
-0.127 -0.0050
603.250 23.7500
711.200 28.0000
+0.152 +0.0060
+0.076 +0.0030
711.200 28.0000
838.200 33.0000
+0.178 +0.0070
+0.076 +0.0030
(1)Tolerance range is from +0 to value listed.
TABLE 32. THRUST tapered Roller Bearings – TTHD BEARINGS – FITTING GUIDELINES Rotating Ring
Bore
Class 2
Stationary Ring Class 3
Over
Incl.
Tolerance
Shaft O.D. Deviation
Resultant Fit
Tolerance
Shaft O.D. Deviation
Resultant Fit
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
mm in.
0.000
304.800
0.0000
12.0000
0.000 +0.025 0.0000 +0.0010
+0.076 +0.050 +0.0030 +0.0020
0.076T 0.025T 0.0030T 0.0010T
0.000 +0.013 0.0000 +0.0005
+0.051 +0.038 +0.0020 +0.0015
0.051T 0.025T 0.0020T 0.0010T
304.800
609.600
12.0000
24.0000
0.000 +0.051 0.0000 +0.0020
+0.152 +0.102 +0.0060 +0.0040
0.152T 0.051T 0.0060T 0.0020T
0.000 +0.025 0.0000 +0.0010
+0.102 +0.076 +0.0040 +0.0030
0.102T 0.051T 0.0040T 0.0020T
609.600
914.400
24.0000
36.0000
0.000 +0.076 0.0000 +0.0030
+0.204 +0.127 +0.0080 +0.0050
0.204T 0.051T 0.0080T 0.0020T
0.000 +0.038 0.0000 +0.0015
+0.127 +0.089 +0.0050 +0.0035
0.127T 0.051T 0.0050T 0.0020T
914.400
1219.200
36.0000
48.0000
0.000 +0.102 0.0000 +0.0040
+0.254 +0.153 +0.0100 +0.0060
0.254T 0.051T 0.0100T 0.0020T
0.000 +0.051 0.0000 +0.0020
+0.153 +0.102 +0.0060 +0.0040
0.153T 0.051T 0.0060T 0.0020T
0.000 +0.127 0.0000 +0.0050
+0.305 +0.178 +0.0120 +0.0070
0.305T 0.051T 0.0120T 0.0020T
0.000 +0.076 0.0000 +0.0030
+0.204 +0.127 +0.0080 +0.0050
0.204T 0.051T 0.0080T 0.0020T
1219.200 48.0000
52
TIMKEN TAPERED ROLLER BEARING CATALOG
Class 2 and 3
TTHD - Rotating ring O.D. must have a minimum radial clearance of 2.5 mm (0.1 in.).
All sizes
Provide a minimum radial clearance of 2.5 mm (0.1 in.) between ring bore and shaft O.D.
- TTHD stationary ring O.D. must have a minimum loose fit of 0.25 to 0.37 mm (0.01 to 0.015 in.). - TTHDFL ring when stationary may be loose fit on its O.D. (same as the TTHD) or may be 0.025 to 0.076 mm (0.001 to 0.003 in.) tight.
ENGINEERING operating temperatures
OPERATING TEMPERATURES Bearings operate in a wide range of applications and environments. In most cases, bearing operating temperature is not an issue. Some applications, however, operate at extreme speeds or in extreme temperature environments. In these cases, care must be taken not to exceed the temperature limits of the bearing. Minimum temperature limits are primarily based on lubricant capability. Maximum temperature limits are most often based on material and/or lubricant constraints, but also may be based on accuracy requirements of the equipment that the bearings are built into. These constraints/limitations are discussed below.
Bearing material limitations Standard bearing steels with a standard heat treatment cannot maintain a minimum hardness of 58 HRC much above 120° C (250° F). Dimensional stability of Timken bearings is managed through the proper selection of an appropriate heat-treat process. Standard Timken tapered roller and ball bearings are dimensionally stabilized from -54° C (-65° F) up to 120° C (250° F), while standard spherical roller bearings are dimensionally stabilized up to 200° C (392° F) and standard cylindrical roller bearings are stabilized up to 150° C (302° F). Upon request, these bearings can be ordered to higher levels of stability as listed below. These designations are in agreement with DIN Standard 623. TABLE 33. Stability Designation
Maximum Operating Temperature °C
°F
S0
150
302
S1
200
392
S2
250
482
S3
300
572
S4
350
662
With dimensionally stabilized product, there still may be some changes in dimensions during service as a result of microstructural transformations. These transformations include the continued tempering of martensite and decomposition of retained austenite. The magnitude of change depends on the operating temperature, the time at temperature and the composition and heat-treatment of the steel.
Temperatures exceeding the limits shown in table 33 require special high-temperature steel. Consult your Timken engineer for availability of specific part numbers for non-standard heat stability or high-temperature steel grades. Suggested materials for use in balls, rings and rollers at various operating temperatures are listed in table 34. Also listed are chemical composition recommendations, hardness recommendations and dimensional stability information. Operating temperature affects lubricant film thickness and setting, both of which directly influence bearing life. Extremely high temperatures can result in a reduced film thickness that can lead to asperity contact between contacting surfaces. Operating temperature also can affect performance of cages, seals and shields, which in turn can affect bearing performance. Materials for these components and their operating temperature ranges are shown in table 35.
Lubrication limitations Starting torque in grease-lubricated applications typically increases significantly at cold temperatures. Starting torque is not primarily a function of the consistency or channel properties of the grease. Most often, it is a function of the rheological properties of the grease. The high-temperature limit for greases is generally a function of the thermal and oxidation stability of the base oil in the grease and the effectiveness of the oxidation inhibitors. See the Lubrication and Seals section on page 61 for more information on lubrication limitations.
Equipment requirements The equipment designer must evaluate the effects of temperature on the performance of the equipment being designed. Precision machine tool spindles, for example, can be very sensitive to thermal expansions. For some spindles, it is important that the temperature rise over ambient be held to 20° C to 35° C (36° F to 45° F). Most industrial equipment can operate at considerably higher temperatures. Thermal ratings on gear drives, for example, are based on 93° C (200° F). Equipment such as gas turbines operates continuously at temperatures above 100° C (212° F). Running at high temperatures for extended periods of time, however, may affect shaft and housing fits, if the shaft and housing are not machined and heat-treated properly .
TIMKEN TAPERED ROLLER BEARING CATALOG
53
ENGINEERING operating temperatures
Although bearings can operate satisfactorily up to 120° C (250° F), an upper temperature limit of 80° C to 95° C (176° F to 203° F) is more practical. Higher operating temperatures increase the risk of damage from transient temperature spikes. Prototype testing of the application can help define the operating temperature range and should be conducted if possible. It is the responsibility of the equipment designer to weigh all relevant factors and make the final determination of satisfactory operating temperature.
Tables 34 and 35 provide standard operating temperatures for common bearing component materials. They should be used for reference purposes only. Other bearing component materials are available on request. Contact your Timken engineer for more information.
TABLE 34. Operating temperatures for bearing component materials Approximate Chemical Analysis %
Temp. ˚F
Hardness HRC
Low-alloy carbonchromium bearing steels. 52100 and others per ASTM A295
1C 0.5–1.5Cr 0.35Mn
70
60
Low-alloy carbonchromium bearing steels. 52100 and others per ASTM A295
1C 0.5–1.5Cr 0.35Mn
70 350 450
58 56 54
Heat stabilized per FS136,
View more...
Comments
